1 2 3 5 6 10 15 30.
The lowest common factor of any pair of positive integers is 1. The highest common factor of 15 and 30 is 15
The least common factor of any set of positive integers is 1.
The LEAST common factor of any set of positive numbers is 1.
The least common factor of any set of positive integers is 1.
The least common factor of any set of positive integers is 1.
The least common factor of any set of positive integers is 1.
The least common factor of any set of positive integers is 1.
The lowest common factor of any set of positive integers is 1.
The least common factor of any set of positive integers is 1.
The lowest common factor of any set of positive integers is 1.
The least common factor of any set of positive integers is 1.
The least common factor of any set of positive integers is 1.