Greatest Common Factor of 640, 680

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

GCF of two or more numbers Calculator allows you to quickly calculate the GCF of 640, 680 i.e. 40 largest integer that divides all the numbers equally.

Greatest common factor (GCF) of 640, 680 is 40.

GCF(640, 680) = 40

GCF of 640, 680

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

GCF of:

Greatest Common Factor of 640,680

GCF of 640,680 is 40

2 640, 680
2 320, 340
2 160, 170
5 80, 85
16, 17

∴ So the GCF of the given numbers is 2 x 2 x 2 x 5 = 40

Greatest Common Factor (GCF) By Matching Biggest Common Factor Method

Factors of 640

List of positive integer factors of 640 that divides 640 without a remainder.

1,2,4,5,8,10,16,20,32,40,64,80,128,160,320,640

Factors of 680

List of positive integer factors of 680 that divides 680 without a remainder.

1,2,4,5,8,10,17,20,34,40,68,85,136,170,340,680

Greatest Common Factor

We found the factors 640,680 . The biggest common factor number is the GCF number.
So the greatest common factor 640,680 is 40.

GCF of two or more Numbers Calculation Examples

Here are some samples of GCF of two or more Numbers calculations.

Frequently Asked Questions on GCF of 640, 680

1. What is the GCF of 640, 680?

Answer: GCF of 640, 680 is 40.

2. How to Find the GCF of 640, 680

Answer: Greatest Common Factor(GCF) of 640, 680 = 40

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(640, 680) = 40.