441 = 32 x 72
23 x 32 x 11 = 792
22 x 52 x 13 = 1300
2^2 x 5^2 x 13
Suppose you have a prime factor with an exponent of n. Then that prime factor can appear 0, 1, 2, ... , n times in a compound factor: that is, there are (n+1) different exponents that it can take.
32*52 = 225
22*72 = 196
2^2 = 4
2 x 72 = 98
22 x 32 = 36
245 = 51 x 72
23*32*5 = 360
22*52*43 = 4300
31 x 72 = 147
75 = 3 x 52
441 = 32 x 72
2 x 52 x 7 = 350