Greatest Common Factor of 21, 82, 820

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

• Greatest Common Factor of 21, 82, 820 by common division method
• Greatest Common Factor of 21, 82, 820 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 82

List of positive integer factors of 82 that divides 82 without a remainder.

1,2,41,82

Factors of 820

List of positive integer factors of 820 that divides 820 without a remainder.

1,2,4,5,10,20,41,82,164,205,410,820

Greatest Common Factor

We found the factors 21,82,820 . The biggest common factor number is the GCF number.
So the greatest common factor 21,82,820 is 1.

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

• GCF of 87, 68, 729
• GCF of 59, 44, 892
• GCF of 10, 75, 954
• GCF of 15, 53, 785
• GCF of 43, 75, 943

1. What is the GCF of 21, 82, 820?

Answer: GCF of 21, 82, 820 is 1.

2. How to Find the GCF of 21, 82, 820

Answer: Greatest Common Factor(GCF) of 21, 82, 820 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 82, 820) = 1.