(304) = 2 * (152) = 2 * (76) = 2 * (38) = 2 * 19
so prime factors of 304 are 2,2,2,2 and 19
304 152,2 76,2,2 38,2,2,2 19,2,2,2,2
304 152,2 76,2,2 38,2,2,2 19,2,2,2,2
Use a factor tree. 304 152,2 76,2,2 38,2,2,2 19,2,2,2,2
77 7,11
15 3,5
1,270,2,135
23 is a prime number. No prime factorization. No tree.
13 is already prime. It doesn't need a tree.
275 55,5 11,5,5
188 94,2 47,2,2
75 25,3 5,5,3
39 3,13