GCF for 80 and 990

What is the Greatest Common Factor of 80 and 990?

Answer: GCF of 80 and 990 is 10

(Ten)

Finding GCF for 80 and 990 using all factors (divisors) listing

The first method to find GCF for numbers 80 and 990 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 990: 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990

So the Greatest Common Factor for 80 and 990 is 10

Finding GCF for 80 and 990 by Prime Factorization

The second method to find GCF for numbers 80 and 990 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 990: 2, 3, 3, 5, 11

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

Now we need to multiply them to find GCF: 2 × 5 = 10

GCF Table

Number 1Number 2GCF
659905
6699066
679901
689902
699903
7099010
719901
7299018
739901
749902
7599015
769902
7799011
789906
799901
8099010
819909
829902
839901
849906
859905
869902
879903
8899022
899901
9099090
919901
929902
939903
949902

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 990? (The answer is: 10). Select the first number (e.g. '80') and the second number (e.g. '990'). 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 990?

GCF of 80 and 990 is 10