Greatest Common Factor of 861, 840
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 861, 840 i.e. 21 largest integer that divides all the numbers equally.
Greatest common factor (GCF) of 861, 840 is 21.
GCF(861, 840) = 21
GCF of 861, 840
Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways
- Greatest Common Factor of 861, 840 by common division method
- Greatest Common Factor of 861, 840 with matching the biggest common factor
GCF of 861,840 is 21
| 3 | 861, 840 |
| 7 | 287, 280 |
| 41, 40 |
∴ So the GCF of the given numbers is 3 x 7 = 21
Factors of 861
List of positive integer factors of 861 that divides 861 without a remainder.
1,3,7,21,41,123,287,861
Factors of 840
List of positive integer factors of 840 that divides 840 without a remainder.
1,2,3,4,5,6,7,8,10,12,14,15,20,21,24,28,30,35,40,42,56,60,70,84,105,120,140,168,210,280,420,840
Greatest Common Factor
We found the factors 861,840 . The biggest common factor number is the GCF number.
So the greatest common factor 861,840 is 21.
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 861, 840
1. What is the GCF of 861, 840?
Answer: GCF of 861, 840 is 21.
2. How to Find the GCF of 861, 840
Answer: Greatest Common Factor(GCF) of 861, 840 = 21
Step 1: Divide all the numbers with common prime numbers having remainder zero.
Step 2: Then multiply all the prime factors GCF(861, 840) = 21.