68 34,2 17,2,2
68 34,2 17,2,2
68 34,2 17,2,2 2^2 x 17 = 68
68 34,2 17,2,2 2 x 2 x 17 = 68
It is: 22*32*7 = 252
35 5,7 No exponents required.
165 55,3 11,5,3 No exponents required.
2^2 x 17 = 68
factor tree of 68:(68) = 2 * (34)(34) = 2 * 17so prime factors are 2 * 2 * 17
68 34,2 17,2,2
68 34,2 17,2,2
68 34,2 17,2,2
68 34,2 17,2,2
68 / \ 2x34 / \ 2x17
32 16,2 8,22 4,23 25
34 17,2 No exponents required.
It looks like an upside-down tree - which is how it gets its name.