Greatest Common Factor of 21, 80, 30, 506

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

• Greatest Common Factor of 21, 80, 30, 506 by common division method
• Greatest Common Factor of 21, 80, 30, 506 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 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Factors of 506

List of positive integer factors of 506 that divides 506 without a remainder.

1,2,11,22,23,46,253,506

Greatest Common Factor

We found the factors 21,80,30,506 . The biggest common factor number is the GCF number.
So the greatest common factor 21,80,30,506 is 1.

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

• GCF of 50, 76, 22, 789
• GCF of 88, 14, 77, 729
• GCF of 51, 91, 80, 137
• GCF of 87, 92, 18, 357
• GCF of 38, 74, 94, 708

1. What is the GCF of 21, 80, 30, 506?

Answer: GCF of 21, 80, 30, 506 is 1.

2. How to Find the GCF of 21, 80, 30, 506

Answer: Greatest Common Factor(GCF) of 21, 80, 30, 506 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 80, 30, 506) = 1.