Greatest Common Factor of 21, 39, 340

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

• Greatest Common Factor of 21, 39, 340 by common division method
• Greatest Common Factor of 21, 39, 340 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 39

List of positive integer factors of 39 that divides 39 without a remainder.

1,3,13,39

Factors of 340

List of positive integer factors of 340 that divides 340 without a remainder.

1,2,4,5,10,17,20,34,68,85,170,340

Greatest Common Factor

We found the factors 21,39,340 . The biggest common factor number is the GCF number.
So the greatest common factor 21,39,340 is 1.

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

• GCF of 17, 61, 843
• GCF of 90, 26, 836
• GCF of 54, 25, 102
• GCF of 33, 55, 260
• GCF of 85, 50, 392

1. What is the GCF of 21, 39, 340?

Answer: GCF of 21, 39, 340 is 1.

2. How to Find the GCF of 21, 39, 340

Answer: Greatest Common Factor(GCF) of 21, 39, 340 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 39, 340) = 1.