19 is already prime; no factorization.
2 and 29
Find the prime factorization. It doesn't matter if you use a factor tree, or rainbow or firework. For example: 42 42 21,2 3,7,2 The prime factorization of 42 is 2 x 3 x 7. The greatest prime factor is 7.
2 x 5 = 10
3 * 5 * 7 * 11 = 1,155
2 x 2 x 11 = 44
105 = 3 x 5 x 7
Prime factorization is expressing a number as the product of its prime factors. 2 x 3 x 5 x 7 = 210
2 x 2 x 2 x 2 x 5 x 5
No, 6 is not prime. 2 x 2 x 3 x 5 = 60
42 = 2 × 3 × 7
42 = 2 × 3 × 7