###### Asked in Factoring and Multiples

Factoring and Multiples

# What Greatest common factor of 138 and 345?

## Answer

###### Wiki User

###### June 23, 2017 10:01AM

The GCF of 138 and 345 is 69

## Related Questions

###### Asked in Algebra, Factoring and Multiples

### What are the common factors and greatest common factor of 345?

There is neither a greatest common factor nor common factors of
a single number, such as 345, because there cannot be any form of
common factor without two or more numbers to compare. Common
factors are factors that the numbers being compared have in common.
The greatest common factor is the largest factor that all the
numbers being compared have in common. Thus, since there are not
two or more numbers to compare, there are neither common factors
nor a greatest common factor.

###### Asked in Factoring and Multiples

### What are the factors and prime factors of 690?

690 is a composite number because it has factors other than 1
and itself. It is not a prime number.
The 16 factors of 690 are 1, 2, 3, 5, 6, 10, 15, 23, 30,
46, 69, 115, 138, 230, 345, and 690.
The factor pairs of 690 are 1 x 690, 2 x 345, 3 x 230, 5
x 138, 6 x 115, 10 x 69, 15 x 46, and 23 x 30.
The proper factors of 690 are 1, 2, 3, 5, 6, 10, 15, 23,
30, 46, 69, 115, 138, 230, and 345 or,
if the definition you are using excludes 1, they are 2, 3, 5, 6,
10, 15, 23, 30, 46, 69, 115, 138, 230, and 345.
The prime factors of 690 are 2, 3, 5, and 23.
The 4 distinct prime factors (listing each prime factor
only once) of 690 are 2, 3, 5, and 23.
The prime factorization of 690 is 2 x 3 x 5 x 23.
NOTE: There cannot be common factors, a greatest common factor,
or a least common multiple because "common" refers to factors or
multiples that two or more numbers have in common.