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# What is a deficient number?

91011

## Answer

###### Wiki User

###### 10/23/2008

A deficient number is a number with its proper factors equalling a lower number than itself.

## Related Questions

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### Is deficient a number?

no. its a type of number. as in, a number can be deficient.

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### What is a deficient number in math?

a deficient number is greater than the sum of its proper
divisors

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###### Asked in Prime Numbers

### Is any prime number have to be deficient?

All prime numbers are deficient.

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### Is 13 a deficient number?

Yes, like all primes, 13 is deficient.

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###### Asked in School Subjects, Math and Arithmetic, Prime Numbers, Numbers

### Is 15 a deficient number?

Yes 15 is a deficient number because its factors add upp to less
than the number itself,which is 15.
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###### Asked in Math and Arithmetic, Prime Numbers

### Is 99 a deficient number?

A number whose proper factors add up to less than the number is
called deficient. 99 is a deficient number because the sum of its
proper factors (1, 3, 9, 11, and 33) is 57.
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###### Asked in Prime Numbers

### Is the number 17 a Deficient number?

17 is a deficient number because half the sum its factors is
less than 17 [(1 + 17)/2 = 9)]. All odd numbers less than 945 are
deficient.
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###### Asked in Paris, Civil Engineering, Bridges and Tunnels

### How many obsolete and deficient bridges are there?

The number of structurally deficient bridges totaled 82,636, and
the number of functionally obsolete totaled 79,869.
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###### Asked in Prime Numbers

### Is prime number an abundant number or deficient number?

All prime numbers are going to be deficient, because remember
that a prime number's only factors are one and itself. To
find if its deficient or abundant, you'd add up all of its factors,
excluding itself. If its only other factor beside itself is one,
that's obviously less than the number, and therefore it will be
deficient.
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###### Asked in Chemistry

### Is 16 a deficient number?

16 is not a deficent number because it is a abundant number

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###### Asked in Math and Arithmetic, Prime Numbers

### Is 63 a deficient number?

All odd numbers with one or two distinct prime
factors are deficient. Since 3 and 7 are factors of 63, it must be
deficient.
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###### Asked in Prime Numbers, Numbers

### Can an Abundant number be a prime number?

No, all prime numbers are deficient.

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###### Asked in Math and Arithmetic, Numbers

### Is 8 an abundant number or a deficient number?

It is a deficient number. The first abundant number is 12.
12: 1,2,3,4,6,12 which equal 28 28>(12*2) and the abundance
is 28-(12*2)=4
...

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###### Asked in Math and Arithmetic

### Why is the number 23 deficient?

A deficient number is one for which the sum of its factors, with
the exception of itself, is less than the number itself. Or
alternatively, any number for which the sum of its factors
including itself is two times the number in question. As 23 is a
prime number, its only factor other than itself is 1. Another
example of a deficient number close to 23 is 26 - its factors,
other than itself, are 1, 2, and 13, which, added...

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###### Asked in Prime Numbers

### How can you tell if 54 is a deficient number?

Add up its proper factors. If that sum is less than 54, it's
deficient.

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###### Asked in Math and Arithmetic, Numbers

### Why is 35 deficient is it because its greater to the submultiple of all positive integers?

35 is a deficient number because the sum of its proper divisors
is less than the number itself.
...

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###### Asked in Math and Arithmetic

### Is 76 an abundant deficient or perfect?

Abundant, deficient and perfect numbers are determined by the
sum of the proper divisors (or factors) of a number, which excludes
the number itself.
The factors of 76 are : 1,2,4,19,38,76 . . . after excluding the
number itself the sum of the proper divisors is :-
1+2+4+19+38= 64
Deficient numbers occur when the sum of the proper divisors is
less than the number itself.
As 64 is less that 76 then it is deficient.
...

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###### Asked in Numbers

### Is the number 47 a dificient number?

Yes. All prime numbers are deficient.

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###### Asked in Prime Numbers

### Is it possible for a prime number to be a perfect number and why?

No, all prime numbers are deficient.

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###### Asked in Math and Arithmetic

### Is 75 perfect abundant or deficient?

A perfect number is one with factors (apart from itself) that
sum to give the original number. An abundant number is one where
this sum is greater than the original number. A deficient number is
one where the sum is less than the original number. The factors of
75 are 1, 3, 5, 15 and 25. The sum of these numbers is 49. Thus 75
is a deficient number.
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###### Asked in Math and Arithmetic, Prime Numbers

### Is the number 32 an abundant deficient or perfect number?

The proper divisors of 32 are 1, 2, 4, 8, and 16. They add up to
31, so 32 is deficient.
...

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