6 is a factor of 18, so the least common multiple is 18.
The least common factor is: 1
The least common factor of 9, 12 and 18 is 1.
The least common factor is: 1
It is 1 but the highest common factor is 18
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 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.