Ok so If we take out 5, we are left with 3675 / 5 = 735
Take out 5 again 735 / 5 = 147
Take out 3, 147/3 = 49
Take out 7, 49 / 7 = 7
Take out 7 again 7/7 = 1
To check we have 5 x 5 x 3 x 7 x 7 = 3675
3, 5 and 7 are all prime numbers
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