Greatest Common Factor of 21, 19, 17, 538

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

• Greatest Common Factor of 21, 19, 17, 538 by common division method
• Greatest Common Factor of 21, 19, 17, 538 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 19

List of positive integer factors of 19 that divides 19 without a remainder.

1,19

Factors of 17

List of positive integer factors of 17 that divides 17 without a remainder.

1,17

Factors of 538

List of positive integer factors of 538 that divides 538 without a remainder.

1,2,269,538

Greatest Common Factor

We found the factors 21,19,17,538 . The biggest common factor number is the GCF number.
So the greatest common factor 21,19,17,538 is 1.

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

• GCF of 53, 74, 54, 627
• GCF of 94, 15, 38, 826
• GCF of 10, 58, 21, 960
• GCF of 68, 60, 37, 389
• GCF of 87, 78, 27, 565

1. What is the GCF of 21, 19, 17, 538?

Answer: GCF of 21, 19, 17, 538 is 1.

2. How to Find the GCF of 21, 19, 17, 538

Answer: Greatest Common Factor(GCF) of 21, 19, 17, 538 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 19, 17, 538) = 1.