Greatest Common Factor of 20, 51, 621

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

• Greatest Common Factor of 20, 51, 621 by common division method
• Greatest Common Factor of 20, 51, 621 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 20

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

1,2,4,5,10,20

Factors of 51

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

1,3,17,51

Factors of 621

List of positive integer factors of 621 that divides 621 without a remainder.

1,3,9,23,27,69,207,621

Greatest Common Factor

We found the factors 20,51,621 . The biggest common factor number is the GCF number.
So the greatest common factor 20,51,621 is 1.

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

• GCF of 92, 44, 168
• GCF of 55, 24, 534
• GCF of 13, 48, 971
• GCF of 67, 68, 460
• GCF of 67, 37, 323

1. What is the GCF of 20, 51, 621?

Answer: GCF of 20, 51, 621 is 1.

2. How to Find the GCF of 20, 51, 621

Answer: Greatest Common Factor(GCF) of 20, 51, 621 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 51, 621) = 1.