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The least common factor of any set of positive integers is 1.

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Q: What is the least common factor of 18 and 20?
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What is the greatest common factor and the least common multiple of 18 and 20?

The greatest common factor is 2 and the least common multiple is also 2.


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The Greatest Common Factor of 18, 13, and 20 is 1.


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The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.The least common multiple of 18, 20, and 30 is 180.


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