Find the greatest common factor (GCF), also called the highest common factor (HCF) or GCD, of two or more numbers, with prime factors and the LCM.
About this tool
Find the greatest common factor (highest common factor) of numbers with steps.
How to use GCF & HCF Calculator
- Enter two or more whole numbers.
- Read the GCF.
- Use the prime factorizations to see which factors the numbers share.
Worked example
The GCF of 48, 180 and 72 is 12, so 48:180:72 simplifies to 4:15:6.
Are GCF, HCF and GCD the same?
Yes. They are three names for the largest number that divides all the given numbers.
What does a GCF of 1 mean?
The numbers share no factor except 1, so they are coprime.
- GCF & HCF Calculator — Find the greatest common factor (highest common factor) of numbers with steps.
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