The least common factor of any set of integers is 1. If the numbers are co-prime, then the greatest common factor will also be 1 and thus the least and greatest common factors will be the same.
No.
In the list of common factors, the greatest is the largest, the least is the smallest (which is always 1)
there is common, least common factor, and greatest common
1, 2, 3, 6
126, 252, 378, 504.
540, 1080, 1620, 2160.
1, 2, 3, 6
They are: 1, 2, 3 and 6
1, 2, 3 and 6
1, 2, 3, 4
1, 2, 3 and 4