What you have to do is find something that can make 250. For example you can do 2 times 125. Then you continue to break down the numbers. The thing is that if you have a Prime number you end that branch. THen you continue until all the branches are cut off. Once you do that you have a factorization tree for 250 and this works for any number. Your Welcome!
250 125,2 25,5,2 5,5,5,2
250 125,2 25,5,2 5,5,5,2
The prime factorization for 250 is: 2 x 5 x 5 x 5
63 / × \ 7 × 9 / /\ 7 × 3×3
96 48,2 24,2,2 12,2,2,2 6,2,2,2,2 3,2,2,2,2,2
250 125,2 25,5,2 5,5,5,2
250 125,2 25,5,2 5,5,5,2
A factor tree
The prime factorization for 250 is: 2 x 5 x 5 x 5
3, 3, 3 and 3
999 333,1 111,3,3 37,3,3,3
1997 is already prime; no tree.
63 / × \ 7 × 9 / /\ 7 × 3×3
96 48,2 24,2,2 12,2,2,2 6,2,2,2,2 3,2,2,2,2,2
250 = 21 x 53
2 x 53 = 250
2 x 53 = 250