279
93 x 3
31 x 3 x 3
15 3,5
77 7,11
1,270,2,135
13 is already prime. It doesn't need a tree.
23 is a prime number. No prime factorization. No tree.
75 25,3 5,5,3
39 3,13
188 94,2 47,2,2
275 55,5 11,5,5
2,675 2,5,125 2,5,5,25 2,5,5,5,5
150 75,2 25,3,2 5,5,3,2
42,2 21,2,2 7,3,2,2