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 31, 28, 13, 21 i.e. 1 largest integer that divides all the numbers equally.
Greatest common factor (GCF) of 31, 28, 13, 21 is 1.
GCF(31, 28, 13, 21) = 1
Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways
∴ GCF of numbers is 1 because of no common factors present between them.
Factors of 31
List of positive integer factors of 31 that divides 31 without a remainder.
1,31
Factors of 28
List of positive integer factors of 28 that divides 28 without a remainder.
1,2,4,7,14,28
Factors of 13
List of positive integer factors of 13 that divides 13 without a remainder.
1,13
Factors of 21
List of positive integer factors of 21 that divides 21 without a remainder.
1,3,7,21
Greatest Common Factor
We found the factors 31,28,13,21 . The biggest common factor number is the GCF number.
So the greatest common factor 31,28,13,21 is 1.
Here are some samples of GCF of two or more Numbers calculations.
1. What is the GCF of 31, 28, 13, 21?
Answer: GCF of 31, 28, 13, 21 is 1.
2. How to Find the GCF of 31, 28, 13, 21
Answer: Greatest Common Factor(GCF) of 31, 28, 13, 21 = 1
Step 1: Divide all the numbers with common prime numbers having remainder zero.
Step 2: Then multiply all the prime factors GCF(31, 28, 13, 21) = 1.