The least common factor of 4 and 9 is is: 1
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The GCF is 1. The least common factor for ANY set of numbers MUST be 1.
The least common factor of any set of integers is 1.
The least common factor is 1. the least common MULTIPLE is 72
The least common factor of any set of integers is 1.
The least common factor of any set of positive integers is 1.