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 645, 640 i.e. 5 largest integer that divides all the numbers equally.
Greatest common factor (GCF) of 645, 640 is 5.
GCF(645, 640) = 5
Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways
5 | 645, 640 |
129, 128 |
∴ So the GCF of the given numbers is 5 = 5
Factors of 645
List of positive integer factors of 645 that divides 645 without a remainder.
1,3,5,15,43,129,215,645
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
Greatest Common Factor
We found the factors 645,640 . The biggest common factor number is the GCF number.
So the greatest common factor 645,640 is 5.
Here are some samples of GCF of two or more Numbers calculations.
1. What is the GCF of 645, 640?
Answer: GCF of 645, 640 is 5.
2. How to Find the GCF of 645, 640
Answer: Greatest Common Factor(GCF) of 645, 640 = 5
Step 1: Divide all the numbers with common prime numbers having remainder zero.
Step 2: Then multiply all the prime factors GCF(645, 640) = 5.