Greatest Common Factor of 20, 81, 620

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

• Greatest Common Factor of 20, 81, 620 by common division method
• Greatest Common Factor of 20, 81, 620 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 620

List of positive integer factors of 620 that divides 620 without a remainder.

1,2,4,5,10,20,31,62,124,155,310,620

Greatest Common Factor

We found the factors 20,81,620 . The biggest common factor number is the GCF number.
So the greatest common factor 20,81,620 is 1.

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

• GCF of 25, 86, 192
• GCF of 49, 61, 505
• GCF of 22, 71, 705
• GCF of 34, 61, 524
• GCF of 74, 92, 356

1. What is the GCF of 20, 81, 620?

Answer: GCF of 20, 81, 620 is 1.

2. How to Find the GCF of 20, 81, 620

Answer: Greatest Common Factor(GCF) of 20, 81, 620 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 81, 620) = 1.