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20 is a composite number. A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

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Q: What is a prime factor of composite number 20?

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20 is a composite number

20 is a composite number. Its factors are 1, 2, 4, 5, 10, and 20.

Composite. It can be divided by 5 or 4.

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