Greatest Common Factor of 21, 51, 65, 499

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

• Greatest Common Factor of 21, 51, 65, 499 by common division method
• Greatest Common Factor of 21, 51, 65, 499 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 51

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

1,3,17,51

Factors of 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

Factors of 499

List of positive integer factors of 499 that divides 499 without a remainder.

1,499

Greatest Common Factor

We found the factors 21,51,65,499 . The biggest common factor number is the GCF number.
So the greatest common factor 21,51,65,499 is 1.

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

• GCF of 99, 93, 71, 133
• GCF of 72, 79, 91, 878
• GCF of 87, 20, 64, 624
• GCF of 38, 23, 94, 165
• GCF of 87, 51, 54, 709

1. What is the GCF of 21, 51, 65, 499?

Answer: GCF of 21, 51, 65, 499 is 1.

2. How to Find the GCF of 21, 51, 65, 499

Answer: Greatest Common Factor(GCF) of 21, 51, 65, 499 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 51, 65, 499) = 1.