What is the greatest common factor of 45 and 120?

April 2023 · 2 minute read

Greatest Common Factor Calculator / Converter

You have reached us maybe looking for answers to the questions like: What is the greatest common factor of 45 and 120? or what is the highest common factor (HCF) of 45 and 120?

What is the GCF of 45 and 120?

The first step to find the gcf of 45 and 120 is to list the factors of each number. The factors of 45 are 1, 3, 5, 9, 15 and 45. The factors of 120 are 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60 and 120. So, the Greatest Common Factor for these numbers is 15 because it divides all them without a remainder. Read more about Common Factors below.

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How to find the Greatest Common Factor

GCF example:

The first step is to find all divisors of each number. For instance, let us find the gcf(45, 120).

In this case we have:

The second step is to analyze which are the common divisors. It is not difficult to see that the 'Greatest Common Factor' or 'Divisor' for 45 and 120 is 15. The GCF is the largest common positive integer that divides all the numbers (45, 120) without a remainder.

In the name greatest common divisor, the adjective "greatest" may be replaced by "highest", and the word "divisor" may be replaced by "factor", so that other names include highest common factor (hcf), greatest common measure, among others.

So, the GCF is also known as:

Greatest Common Factor Calculator

Greatest Common Factor Calculator

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GCF Examples

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