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Short answer: There are none.

There is neither a greatest common factor nor common factors of a single number, such as 480, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor.

Examples:

The common factors of 13 and 480 are only 1; the greatest common factor is 1.

The common factors of 81 and 480 are 1 and 3; the greatest common factor is 3.

The common factors of 158 and 480 are 1 and 2; the greatest common factor is 2.

The common factors of 380 and 480 are 1, 2, 4, 5, 10, and 20; the greatest common factor is 20.

The common factors of 480 and 492 are 1, 2, 3, 4, 6, and 12; the greatest common factor is 12.

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15y ago
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Q: What are the common factors and greatest common factor of 480?
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