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The factors of 16 are:

1, 2, 4, 8, 16

The factors of 40 are:

1, 2, 4, 5, 8, 10, 20, 40

The common factors are:

1, 2, 4, 8

The Greatest Common Factor:

GCF = 8

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Q: What is the greatest common factor and factors of 16 and 40?
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