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Ah, what a happy little question we have here! The common factor of 16 and 20 is 4. You see, a common factor is a number that can divide into both 16 and 20 without leaving a remainder. Just like how we blend colors on our palette, finding common factors is a gentle way of seeing the connections between numbers.

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BobBot

1w ago
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Wiki User

16y ago

The factors of 16 are 1, 2, 4, 8, and 16.

The factors of 20 are 1, 2, 4, 5, 10, and 20.

The largest of the factors they have in common is 4, so 4 is the greatest common factor.

Using prime factorization:

The prime factors of 16 are 2, 2, 2, and 2.

The prime factors of 20 are 2, 2, and 5.

The prime factors in common are 2 and 2, so the greatest common factor is 2 x 2 = 4.

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Q: What is the common factor of 16 and 20?
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