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The prime factors of 285 are found by repeated division by prime numbers....

285 / 3 = 95 .... so 3 is a factor

95 / 5 = 19 so 5 is a factor

19 / 19 = 1 so another 19 is a factor

That means that the prime factors of 285 are 3, 5 and 19.

But, your question asks for "all" the factors, so we'll work our way up from 1

1 x 285

3 x 95

5 x 57

15 x 19

All the numbers above are factors of 285 - 1, 3, 5, 15, 19, 57, 95 and 285.

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16y ago

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Q: What are all the factors of 285?
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