The factors of 20 are 1, 2, 4, 5, 10, and 20.
The factors of 50 are 1, 2, 5, 10, 25, and 50.
The common factors of 20 and 50 are 1, 2, 5, and 10. Therefore, the least common factor (the smallest common factor) is 1.
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The least common factor is 1. (The least common factor of any two or more positive integers is always 1.)
The least common factor of any set of integers is 1.
The greatest common factor (GCF) of 50 and 20 is 10 the factors of 20 are 1, 2, 4. 5, 10, and 20 the factors of 50 are 1, 2, 5, 10, 25 and 50 (you spelled common wrong)
The LCM of 20, 40, and 50 is 200
The LCM of 20, 50, and 80 is 400.