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.
188 94,2 47,2,2
75 25,3 5,5,3
275 55,5 11,5,5
39 3,13
2,675 2,5,125 2,5,5,25 2,5,5,5,5
56 28,2 14,2,2 7,2,2,2
484 242,2 121,2,2 11,11,2,2