What is the prime factorization of 40?

My answer:2x2x2x5

almost- 1, 16, 2, 8, 4

Isn't sixteen a factor of 16?

You are correct on the prime factors of 40

should i leave the 16 as part of the factor of 16 or no.

yes, leave it. 16 is a factor of 16.

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