Question

In what diffrent ways can 440 be written as the product of two positve integers

Answer 1

 440    = 1 x 2 x 2 x 2 x 5 x 11

(1):            1 x 440

(2):           2 x 220

(2 x 2):     4 x 110

(5):           5 x 88

(2x2x2):   8 x 55

(2 x 5):    10 x 44

(11):          11 x 40

(2x2x5): 20 x 22

No need to continue because the next number is 2 x 11 = 22 and we already have that on the right side, so we have found all of the multiplicative pairs of 440.