2572/2=1286
1286/2=643
2*2*643
11,5.
3
67 is already prime; no factorization required.
The prime factorization of 87 is 1,3,29, and 87
Just 5.
21 34 56
The prime factorization of 72 is 72 9 x 8
5*5*2*2
32 x 31 = 279
5*5*2*2
It is: 3*7*7 = 147
It is: 3*3*5 = 45