Greatest Common Factor of 21, 68, 31, 609

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

• Greatest Common Factor of 21, 68, 31, 609 by common division method
• Greatest Common Factor of 21, 68, 31, 609 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 68

List of positive integer factors of 68 that divides 68 without a remainder.

1,2,4,17,34,68

Factors of 31

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

1,31

Factors of 609

List of positive integer factors of 609 that divides 609 without a remainder.

1,3,7,21,29,87,203,609

Greatest Common Factor

We found the factors 21,68,31,609 . The biggest common factor number is the GCF number.
So the greatest common factor 21,68,31,609 is 1.

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

• GCF of 59, 36, 41, 981
• GCF of 60, 83, 90, 622
• GCF of 81, 18, 20, 536
• GCF of 54, 73, 61, 529
• GCF of 97, 89, 20, 949

1. What is the GCF of 21, 68, 31, 609?

Answer: GCF of 21, 68, 31, 609 is 1.

2. How to Find the GCF of 21, 68, 31, 609

Answer: Greatest Common Factor(GCF) of 21, 68, 31, 609 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 68, 31, 609) = 1.