Greatest Common Factor of 57, 21, 813

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

• Greatest Common Factor of 57, 21, 813 by common division method
• Greatest Common Factor of 57, 21, 813 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 57

List of positive integer factors of 57 that divides 57 without a remainder.

1,3,19,57

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 813

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

1,3,271,813

Greatest Common Factor

We found the factors 57,21,813 . The biggest common factor number is the GCF number.
So the greatest common factor 57,21,813 is 3.

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

• GCF of 44, 33, 644
• GCF of 43, 60, 266
• GCF of 25, 41, 562
• GCF of 42, 15, 363
• GCF of 68, 43, 829

1. What is the GCF of 57, 21, 813?

Answer: GCF of 57, 21, 813 is 3.

2. How to Find the GCF of 57, 21, 813

Answer: Greatest Common Factor(GCF) of 57, 21, 813 = 3

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

Step 2: Then multiply all the prime factors GCF(57, 21, 813) = 3.