Greatest Common Factor of 420, 337, 21

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

• Greatest Common Factor of 420, 337, 21 by common division method
• Greatest Common Factor of 420, 337, 21 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 420

List of positive integer factors of 420 that divides 420 without a remainder.

1,2,3,4,5,6,7,10,12,14,15,20,21,28,30,35,42,60,70,84,105,140,210,420

Factors of 337

List of positive integer factors of 337 that divides 337 without a remainder.

1,337

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 420,337,21 . The biggest common factor number is the GCF number.
So the greatest common factor 420,337,21 is 1.

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

• GCF of 488, 213, 81
• GCF of 406, 641, 54
• GCF of 106, 277, 26
• GCF of 370, 697, 54
• GCF of 517, 929, 45

1. What is the GCF of 420, 337, 21?

Answer: GCF of 420, 337, 21 is 1.

2. How to Find the GCF of 420, 337, 21

Answer: Greatest Common Factor(GCF) of 420, 337, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(420, 337, 21) = 1.