Question

What is all the prime factors of 20?

Answer 1

2 and 5 are the only prime factors of 20

Explanation:

First list all the factors of 20:

1, 20, 2, 10, 4, and 5

Out of these, only 2 and 5 are prime. Prime numbers must have 2 factors (1 and itself).

The prime factorization of 20 is `2*2*5`. These three (prime) numbers, when multiplied together, equal 20.