GCF for 80 and 770

What is the Greatest Common Factor of 80 and 770?

Answer: GCF of 80 and 770 is 10

(Ten)

Finding GCF for 80 and 770 using all factors (divisors) listing

The first method to find GCF for numbers 80 and 770 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 770: 1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770

So the Greatest Common Factor for 80 and 770 is 10

Finding GCF for 80 and 770 by Prime Factorization

The second method to find GCF for numbers 80 and 770 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 770: 2, 5, 7, 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
657705
6677022
677701
687702
697701
7077070
717701
727702
737701
747702
757705
767702
7777077
787702
797701
8077010
817701
827702
837701
8477014
857705
867702
877701
8877022
897701
9077010
917707
927702
937701
947702

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 770? (The answer is: 10). Select the first number (e.g. '80') and the second number (e.g. '770'). 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 770?

GCF of 80 and 770 is 10