The square root of 900 is 30 and it is a factor of 900
77 7,11
15 3,5
1,270,2,135
900 450,2 225,2,2 75,3,2,2 25,3,3,2,2 5,5,3,3,2,2
23 is a prime number. No prime factorization. No tree.
13 is already prime. It doesn't need a tree.
275 55,5 11,5,5
188 94,2 47,2,2
75 25,3 5,5,3
39 3,13
2,675 2,5,125 2,5,5,25 2,5,5,5,5