You need at least two numbers to find something in common between them. The least common factor of any set of positive integers is 1.
The least common factor of 54 and 60 is 1, as is the least common factor of any set of numbers. The highest common factor of 54 and 60 is 6
The least common factor is: 1
The least common factor of any set of numbers is 1.
The least common factor of any set of integers is 1.
The least common factor of any set of integers is 1.
The least common factor of any set of integers is 1.
The least common factor of any set of integers is 1.
The least common factor of any set of integers is 1.
The least common factor of any set of integers is 1.
The least common factor of any set of integers is 1.
Are you sure you don't mean least common multiple or greatest common factor? The least common factor, I think, would be 1.
The least common factor of 56 and 60 is 1. The greatest common factor of 56 and 60 is 4.