Greatest Common Factor of 509, 680, 21

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

• Greatest Common Factor of 509, 680, 21 by common division method
• Greatest Common Factor of 509, 680, 21 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 509

List of positive integer factors of 509 that divides 509 without a remainder.

1,509

Factors of 680

List of positive integer factors of 680 that divides 680 without a remainder.

1,2,4,5,8,10,17,20,34,40,68,85,136,170,340,680

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 509,680,21 . The biggest common factor number is the GCF number.
So the greatest common factor 509,680,21 is 1.

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

• GCF of 261, 363, 57
• GCF of 342, 298, 17
• GCF of 419, 983, 53
• GCF of 174, 896, 18
• GCF of 852, 890, 54

1. What is the GCF of 509, 680, 21?

Answer: GCF of 509, 680, 21 is 1.

2. How to Find the GCF of 509, 680, 21

Answer: Greatest Common Factor(GCF) of 509, 680, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(509, 680, 21) = 1.