For example, the greatest common factor of 24 and 36 is 12 because it is the largest positive integer that will divide into both numbers without a remainder.

24/12 = 2 36/12 = 3

Integers are positive or negative whole numbers. Integers do not contain fractions

Whole numbers greater than 0 are positive integers

Whole numbers less than 0 are negative integers

Zero is an integer and is considered "neutral"

The GCF or Greatest Common Factor is simply the largest positive integer that will divide exactly into two or more numbers.