A is.
There is no such thing as a least common number.
You need at least two things to find something in common between them.
least common multiple
1 is the least common factor of the number 2, number 4 and number 7. 28 is the least common multiple of the number 2, number 4 and 7.
the least common multiple, or LCM
LCM
least common multiple, or LCM
least common multiple, or LCM.
The least common multiple, or LCM.
least common multiple, or LCM.
Least Common Multiple (LCM).
The least common multiple, or LCM.