Greatest Common Factor of 18, 51, 20, 656

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

• Greatest Common Factor of 18, 51, 20, 656 by common division method
• Greatest Common Factor of 18, 51, 20, 656 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 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Factors of 51

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

1,3,17,51

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 656

List of positive integer factors of 656 that divides 656 without a remainder.

1,2,4,8,16,41,82,164,328,656

Greatest Common Factor

We found the factors 18,51,20,656 . The biggest common factor number is the GCF number.
So the greatest common factor 18,51,20,656 is 1.

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

• GCF of 95, 25, 25, 281
• GCF of 37, 28, 68, 818
• GCF of 65, 16, 94, 371
• GCF of 76, 37, 73, 725
• GCF of 16, 72, 83, 536

1. What is the GCF of 18, 51, 20, 656?

Answer: GCF of 18, 51, 20, 656 is 1.

2. How to Find the GCF of 18, 51, 20, 656

Answer: Greatest Common Factor(GCF) of 18, 51, 20, 656 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 51, 20, 656) = 1.