29 is prime. No tree.
31 is prime. No tree.
43 is prime. No tree.
12
22 2,11
82 2,41
22 2,11
38 2,19
Factor tree for 51: 51 * 1 or 17 * 3 Factor tree for 255: 255 * 1 or 51 * 5
13 is already prime. It doesn't need a tree.
45 15,3 5,3,3
92 46,2 23,2,2