It is 19 because 19 is a Prime number
19 is a prime number, so it has no prime factorization.
19 is a prime number, so its prime factorization is 1 x 19 or simply 19.
Since 19 is already a prime number, its factorization is simply 19.
19 is already prime; no factorization.
19 is already prime; no factorization.
76 = 2 * 2 * 19
2*2*5*19
19 is prime so the prime factorization would simply be 19.
19 is a prime number so the factorization is 1 x 19
The prime factorization of 38 is 2 x 19.
Prime factorization of 91333 = 11 x 19 x 19 x 23
38 2,19 2 x 19 = 38