Prime Numbers

1 and 1638?

2 and 819?

3 and 546?

Many others.

There is not a term for such numbers.

2 and 5

I mean 28 COPPY THAT！

No but 5 is but 100 isn't but multiply thme together and get 500 so no

The prime factorization of 810 is: 2 x 3 x 3 x 3 x 3 x 5

Prime factors are 2, 3, 11

Other factors are combinations of the primes, i.e.

2 x 3 = 6

2 x 11 = 22

3 x 11 = 33

25 of them.

Yes, 5 is a prime. It has no factors other than 1 and itself.

Yes.

529 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

Any number that ends with 5 is divisible by 5.

Six of the infinite number of composite numbers are 182, 183, 184, 185, 186, and 187.

60

A positive integer with only two factors: one and the number itself.

32=2x2x2x2x2
2 to the 5th power

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97

2 and 5.

Old English hunde(a)htatig, from hund (of uncertain origin) + e(a)hta'eight' + -tig the first element was lost early in the Middle English period.

No.

no

any number divisible by 9 has the digits adding up to 9

e.g. 18 = 1+8 = 9

or 27 = 2+7 = 9

so 117 = 1+1+7 = 9

90 = 9 x 10

then 90+9+9+9 = 117

so 117/9 = 10+3 = 13

16 = 2*2*2*2

285 is a composite number because it has more than two factors

111

3,37

3 x 37 = 111

Two of them which are 2 and 5