GCF means "Greatest Common Factor"
LCM means "Least Common Multiple"
GCF and LCM is not the same.
Here are some reasons:
1. In GCF, we must know what is "the greatest of all common factors"
In LCM, we must know what is "the least of all common multiple"
2. In GCF, we must know the "Common Factors" of a number.
In LCM, we must know the "Common Multiples" of a number