You don't. 13 is a Prime number.
13 is already prime. No factorization necessary.
The prime factorization of 91 is: 7 x 13
13 is already prime. Just write it down.
13 is a prime, so its prime factorization is: 13
13 x 13 = 169 The prime factor of 169 is 13. 13 is the square root of 169.
13 is already prime, no factorization required.
13 is already prime. No factorization.
The prime factorization of 728 is: 2 x 2 x 2 x 7 x 13
13 is already prime and doesn't need a prime factorization.
7 and 13 are already prime, no factorization required.
2 x 3 x 13 = 78
The prime factorization of 91 is 13 x 7 They are both prime so its a prime factorization