How many natural number factors are there of 560?
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The Prime Factorisation of 560 is: 5 6 0 = 2 4 × 5 × 7
Each factor of 560 can either have no factors of 2, 1 factor of 2, 2 factors of 2, 3 factors of 2, or 4 factors of 2, so there are 5 possibilities. There could either be 1 factor of 5 or no factors of 5 so there are 2 possibilities. There is either 1 factor of 7 or no factors of 7, so there are 2 possibilities. So there are 5 × 2 × 2 = 2 0 factors of 560