3 is already prime; no tree.
141 = 3 x 47
The Prime Factorization of 225 is 3 X 3 X 5 X 5.You can find the tree in the related links section below.
As a product of its prime factors: 2*3*13 = 78
1997 is already prime; no tree.
3 * 3 * 5 * 11 = 495 495 165,3 55,3,3 11,5,3,3
3, 3, 3 and 3
2^3 * 7
Factorization: 2*3*3*3*23
2 * 3 * 3 * 3 * 7 * 19 = 7182 7182 3591,2 1197,3,2 399,3,3,2 133,3,3,3,2 19,7,3,3,3,2
150 = 2 × 3 × 52
51 3,17