Greatest Common Factor of 813, 663, 20

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

• Greatest Common Factor of 813, 663, 20 by common division method
• Greatest Common Factor of 813, 663, 20 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 813

List of positive integer factors of 813 that divides 813 without a remainder.

1,3,271,813

Factors of 663

List of positive integer factors of 663 that divides 663 without a remainder.

1,3,13,17,39,51,221,663

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Greatest Common Factor

We found the factors 813,663,20 . The biggest common factor number is the GCF number.
So the greatest common factor 813,663,20 is 1.

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

• GCF of 681, 346, 22
• GCF of 813, 634, 82
• GCF of 767, 466, 19
• GCF of 356, 103, 58
• GCF of 760, 908, 35

1. What is the GCF of 813, 663, 20?

Answer: GCF of 813, 663, 20 is 1.

2. How to Find the GCF of 813, 663, 20

Answer: Greatest Common Factor(GCF) of 813, 663, 20 = 1

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

Step 2: Then multiply all the prime factors GCF(813, 663, 20) = 1.