Prime factorization of 165

Answer 1

You might look for some obvious factor first. In this case, since it ends with 5, it is divisible by 5. Divide 165 / 5 to get the other factor. Then see whether this other factor can be divided into smaller factors. Try small factors (2, 3, 5, 7) first.

Answer 2

The prime factors of 165 are: 3, 5, 11