Greatest Common Factor of 21, 42, 13, 34, 591

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

• Greatest Common Factor of 21, 42, 13, 34, 591 by common division method
• Greatest Common Factor of 21, 42, 13, 34, 591 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 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Factors of 34

List of positive integer factors of 34 that divides 34 without a remainder.

1,2,17,34

Factors of 591

List of positive integer factors of 591 that divides 591 without a remainder.

1,3,197,591

Greatest Common Factor

We found the factors 21,42,13,34,591 . The biggest common factor number is the GCF number.
So the greatest common factor 21,42,13,34,591 is 1.

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

• GCF of 58, 86, 55, 97, 209
• GCF of 79, 27, 54, 38, 235
• GCF of 19, 53, 93, 74, 122
• GCF of 19, 65, 30, 98, 510
• GCF of 77, 85, 49, 85, 280

1. What is the GCF of 21, 42, 13, 34, 591?

Answer: GCF of 21, 42, 13, 34, 591 is 1.

2. How to Find the GCF of 21, 42, 13, 34, 591

Answer: Greatest Common Factor(GCF) of 21, 42, 13, 34, 591 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 42, 13, 34, 591) = 1.