GCF for 80 and 220

What is the Greatest Common Factor of 80 and 220?

Answer: GCF of 80 and 220 is 20

(Twenty)

Finding GCF for 80 and 220 using all factors (divisors) listing

The first method to find GCF for numbers 80 and 220 is to list all factors for both numbers and pick the highest common one:

All factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

All factors of 220: 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220

So the Greatest Common Factor for 80 and 220 is 20

Finding GCF for 80 and 220 by Prime Factorization

The second method to find GCF for numbers 80 and 220 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 80: 2, 2, 2, 2, 5

All Prime Factors of 220: 2, 2, 5, 11

As we can see there are Prime Factors common to both numbers: 2, 2, 5

Now we need to multiply them to find GCF: 2 × 2 × 5 = 20

GCF Table

Number 1Number 2GCF
652205
6622022
672201
682204
692201
7022010
712201
722204
732201
742202
752205
762204
7722011
782202
792201
8022020
812201
822202
832201
842204
852205
862202
872201
8822044
892201
9022010
912201
922204
932201
942202

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest Common Factor of 80 and 220? (The answer is: 20). Select the first number (e.g. '80') and the second number (e.g. '220'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

FAQ

What is the Greatest Common Factor of 80 and 220?

GCF of 80 and 220 is 20