GCF for 90 and 990

What is the Greatest Common Factor of 90 and 990?

Answer: GCF of 90 and 990 is 90

(Ninety)

Finding GCF for 90 and 990 using all factors (divisors) listing

The first method to find GCF for numbers 90 and 990 is to list all factors for both numbers and pick the highest common one:

All factors of 90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

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 90 and 990 is 90

Finding GCF for 90 and 990 by Prime Factorization

The second method to find GCF for numbers 90 and 990 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 90: 2, 3, 3, 5

All Prime Factors of 990: 2, 3, 3, 5, 11

As we can see there are Prime Factors common to both numbers: 2, 3, 3, 5

Now we need to multiply them to find GCF: 2 × 3 × 3 × 5 = 90

GCF Table

Number 1Number 2GCF
7599015
769902
7799011
789906
799901
8099010
819909
829902
839901
849906
859905
869902
879903
8899022
899901
9099090
919901
929902
939903
949902
959905
969906
979901
989902
9999099
10099010
1019901
1029906
1039901
1049902

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 90 and 990? (The answer is: 90). Select the first number (e.g. '90') 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 90 and 990?

GCF of 90 and 990 is 90