Give the prime factorization of the following number.

$12$

Give the prime factorization of the following number.

$18$

Give the prime factorization of the following number.

$48$

Give the prime factorization of the following number.

$56$

Give the prime factorization of the following number.

$90$

Give the prime factorization of the following number.

$136$

Give the prime factorization of the following number.

$252$

Give the prime factorization of the following number.

$420$

Give the prime factorization of the following number.

$637$