Greatest Common Factor of 21, 87, 13, 814

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

• Greatest Common Factor of 21, 87, 13, 814 by common division method
• Greatest Common Factor of 21, 87, 13, 814 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 814

List of positive integer factors of 814 that divides 814 without a remainder.

1,2,11,22,37,74,407,814

Greatest Common Factor

We found the factors 21,87,13,814 . The biggest common factor number is the GCF number.
So the greatest common factor 21,87,13,814 is 1.

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

• GCF of 76, 94, 19, 855
• GCF of 27, 24, 34, 632
• GCF of 69, 75, 95, 292
• GCF of 39, 18, 42, 448
• GCF of 33, 26, 92, 383

1. What is the GCF of 21, 87, 13, 814?

Answer: GCF of 21, 87, 13, 814 is 1.

2. How to Find the GCF of 21, 87, 13, 814

Answer: Greatest Common Factor(GCF) of 21, 87, 13, 814 = 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, 814) = 1.