The least common factor of any set of positive integers is 1.
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The greatest common factor is 2 and the least common multiple is also 2.
The least common factor of any set of numbers is 1.
The Least Common Multiple (LCM) for 18 20 30 is 180.
The Least Common Multiple (LCM) for 18 24 20 is 360.
1 and 2