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GCF Calculator

Greatest Common Factor (GCF, HCF, GCD) Calculator

How to use the GCF calculator

Find the Greatest Common Factor of any number with our Greatest Common Factor Calculator. It will also calculate the Greatest Common Denominator for two numbers and the Highest Common Factor.

The greatest common divisor calculator is used to calculate things like the greatest common factor, the highest common factor, or simply just the greatest common divisor. The GCF of two or more numbers is the largest integer that divides each number exactly.

The Greatest Common Factor (GCF) and Least Common Multiple (LCM) are used in many applications like mathematics, engineering and science. They are necessary for finding the lowest or highest common denominator when adding or multiplying numbers of different unit types. Using the Greatest Common Divisor (GCD) you can find the factorizations both at the same time.

One of the most common uses for Greatest Common Factor and Least Common Multiple is finding the lowest or highest common denominator when adding or multiplying numbers of different unit types. Use the gcf calculator to find out.

Note on Greatest Common Factor of 0

Any non zero whole number times 0 equals 0 so it is true that every non zero whole number is a factor of 0. Therefore it is safe to say that
gcf(n,0) = n for any whole number n.
gcf(0, 0) is undefined.