Greatest Common Factor of 28, 47, 17, 509

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

• Greatest Common Factor of 28, 47, 17, 509 by common division method
• Greatest Common Factor of 28, 47, 17, 509 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 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 47

List of positive integer factors of 47 that divides 47 without a remainder.

1,47

Factors of 17

List of positive integer factors of 17 that divides 17 without a remainder.

1,17

Factors of 509

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

1,509

Greatest Common Factor

We found the factors 28,47,17,509 . The biggest common factor number is the GCF number.
So the greatest common factor 28,47,17,509 is 1.

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

• GCF of 21, 20, 91, 706
• GCF of 13, 73, 63, 986
• GCF of 64, 16, 78, 666
• GCF of 97, 31, 63, 869
• GCF of 72, 52, 58, 405

1. What is the GCF of 28, 47, 17, 509?

Answer: GCF of 28, 47, 17, 509 is 1.

2. How to Find the GCF of 28, 47, 17, 509

Answer: Greatest Common Factor(GCF) of 28, 47, 17, 509 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 47, 17, 509) = 1.