12, 24, 120
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There is no Greatest Common Factor (GCF) for a single number. The Greatest Common Factor is the largest factor common to two or more numbers.
The largest of the common factors of numbers is known as the greatest common divisor or greatest common denominator. The smallest common factor is called the lowest common divisor.
The Greatest Common Factor (GCF) is: 5
The Greatest Common Factor of 30, 40: 10
7