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Short answer: There is none.

There is not a least common factor of a single number, such as 120, 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 least common factor is the smallest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there is not a least common factor.

Note: The least common factor of two or more positive integers is 1.

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15y ago

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