If that's greatest common factor and greatest common divisor, there is no difference between them.
The GCF is 1.
The GCF is ab
The GCF is 2.
The GCF is 3.
The GCF is 3.
The GCF is 25.
The GCF is 2.
The GCF is 22.
The GCF is 8.
The GCF is 7.
The GCF is 7.
The GCF is 26.