Distinct prime factors are 3 and 5.
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The numbers that go into 45 are 1, 5, 9, 45
9, 15, 45 are the composite factors of 45.
If you have a set of 45 numbers, then there is one combination that includes all 45 numbers and 45! = 45 x 44 x 43 x ... x 2 x 1 ≈ 1.19622 x 1056 permutations (ways of ordering) all 45 numbers.
0.0311
45 and 19 are the numbers.