When factoring, each factor that is a prime number.

### Examples

- In the decomposition of the number 44, which is 44 = 2 × 2 × 11, the numbers 2 and 11 are prime factors.
- In the decomposition of the number 20, which is 20 = 2
^{2}× 5, the numbers 2 and 5 are prime factors. - In the decomposition of the number 20, which is 20 = 4 × 5, the number 5 is a prime factor.