The greatest divisor is the largest number that divides into a given number evenly - no remainder or fractions. For example, the greatest divisor of 75 is 25 since no number greater than 25 will go into 75 evenly.
By GCF you mean Greatest Common Divisor = 72
Greatest divisor of 25 and 40 is 5.
The greatest common divisor is 45.
The Greatest Common Divisor is 10
The Greatest Common Divisor is 28
The Greatest Common Divisor is 4
The Greatest Common Divisor is 4
The Greatest Common Divisor is 35
The Greatest Common Divisor is 1
The Greatest Common Divisor is 2
The Greatest Common Divisor is 22
The Greatest Common Divisor is 9