131 is a Prime number. It is only evenly divisible by itself and one.
131 is already prime. No tree.
5 x 131
262 = 2 x 131
3,537 = 3 * 3 * 3 * 131 or 33 * 131
11 x 131 = 1441
325 = 52 x 131
51 x 131 = 65
728 = 23 * 71 * 131
The prime factors are: 3 x 5 x 131
416 = 25 x 131
91 = 71 x 131
65 = 51 x 131