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Anonymous
40 = 2 x 2 x 2 x 5 or 23 x 5
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The prime factorization of 40 is 2x2x2x5 or 23x5.
both
103 is already prime, no need for a factorization.
5 x 13 = 65 2 x 2 x 2 x 5 = 40
23 x 5 = 40 32 x 5 = 45