Greatest Common Factor of 21, 31, 21, 915

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

• Greatest Common Factor of 21, 31, 21, 915 by common division method
• Greatest Common Factor of 21, 31, 21, 915 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 31

List of positive integer factors of 31 that divides 31 without a remainder.

1,31

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 915

List of positive integer factors of 915 that divides 915 without a remainder.

1,3,5,15,61,183,305,915

Greatest Common Factor

We found the factors 21,31,21,915 . The biggest common factor number is the GCF number.
So the greatest common factor 21,31,21,915 is 1.

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

• GCF of 32, 82, 90, 561
• GCF of 85, 48, 51, 564
• GCF of 54, 73, 71, 790
• GCF of 23, 59, 13, 993
• GCF of 21, 73, 70, 876

1. What is the GCF of 21, 31, 21, 915?

Answer: GCF of 21, 31, 21, 915 is 1.

2. How to Find the GCF of 21, 31, 21, 915

Answer: Greatest Common Factor(GCF) of 21, 31, 21, 915 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 31, 21, 915) = 1.