Greatest Common Factor of 21, 87, 13, 79, 59

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

• Greatest Common Factor of 21, 87, 13, 79, 59 by common division method
• Greatest Common Factor of 21, 87, 13, 79, 59 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 87

List of positive integer factors of 87 that divides 87 without a remainder.

1,3,29,87

Factors of 13

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

1,13

Factors of 79

List of positive integer factors of 79 that divides 79 without a remainder.

1,79

Factors of 59

List of positive integer factors of 59 that divides 59 without a remainder.

1,59

Greatest Common Factor

We found the factors 21,87,13,79,59 . The biggest common factor number is the GCF number.
So the greatest common factor 21,87,13,79,59 is 1.

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

• GCF of 20, 92, 80, 56, 74
• GCF of 96, 66, 43, 60, 56
• GCF of 40, 39, 72, 99, 11
• GCF of 90, 69, 56, 10, 11
• GCF of 72, 35, 89, 42, 39

1. What is the GCF of 21, 87, 13, 79, 59?

Answer: GCF of 21, 87, 13, 79, 59 is 1.

2. How to Find the GCF of 21, 87, 13, 79, 59

Answer: Greatest Common Factor(GCF) of 21, 87, 13, 79, 59 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 87, 13, 79, 59) = 1.