You need at least two numbers to find a GCF.
greatest common divisor of 60 and 231 is 3.
The Greatest Common Divisor/Denominator is 3
A single number cannot have a greatest common divisor because "common" refers to divisors that two or more numbers have in common. You have only one number.
The greatest common divisor is 45.
The Greatest Common Divisor is 10
The Greatest Common Divisor is 4
The Greatest Common Divisor is 35
The Greatest Common Divisor is 28
The Greatest Common Divisor is 1
The Greatest Common Divisor is 19
The Greatest Common Divisor is 2
The Greatest Common Divisor is 4