The factors of 6 are:
1, 2, 3, 6
The factors of 19 are:
1, 19
The Greatest Common Factor (GCF) is:
1
The gcf of 6, 15, and 21 is 3. But once you throw that 19 in there, it's ' 1 '.
The GCF is 1.
The GCF is 19.
The GCF is: 19
The GCF is 1.
The GCF is: 1
The GCF is 19.
The GCF is 1.
The GCF is 1.
The GCF is 19.
The GCF is 19.
The GCF is 19.