The GCF is 1.
The GCF is 1.
The GCF is: 1
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF of 21 and 59 is 1.
The GCF is 1.
The GCF is 1.
Since both numbers are prime numbers, the greatest common factor (GCF) of 59 and 13 is 1.
The factors of 59 are: 1, 59 The factors of 81 are: 1, 3, 9, 27, 81