Greatest Common Factor of 21, 51, 558

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

• Greatest Common Factor of 21, 51, 558 by common division method
• Greatest Common Factor of 21, 51, 558 with matching the biggest common factor

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

Factors of 21

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

1,3,7,21

Factors of 51

List of positive integer factors of 51 that divides 51 without a remainder.

1,3,17,51

Factors of 558

List of positive integer factors of 558 that divides 558 without a remainder.

1,2,3,6,9,18,31,62,93,186,279,558

Greatest Common Factor

We found the factors 21,51,558 . The biggest common factor number is the GCF number.
So the greatest common factor 21,51,558 is 3.

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

• GCF of 88, 40, 442
• GCF of 55, 56, 845
• GCF of 84, 22, 250
• GCF of 73, 99, 478
• GCF of 68, 46, 532

1. What is the GCF of 21, 51, 558?

Answer: GCF of 21, 51, 558 is 3.

2. How to Find the GCF of 21, 51, 558

Answer: Greatest Common Factor(GCF) of 21, 51, 558 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 51, 558) = 3.