Greatest Common Factor of 820, 42, 31

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

• Greatest Common Factor of 820, 42, 31 by common division method
• Greatest Common Factor of 820, 42, 31 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 820

List of positive integer factors of 820 that divides 820 without a remainder.

1,2,4,5,10,20,41,82,164,205,410,820

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 31

List of positive integer factors of 31 that divides 31 without a remainder.

1,31

Greatest Common Factor

We found the factors 820,42,31 . The biggest common factor number is the GCF number.
So the greatest common factor 820,42,31 is 1.

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

• GCF of 778, 42, 11
• GCF of 810, 68, 14
• GCF of 224, 65, 48
• GCF of 521, 71, 93
• GCF of 782, 82, 64

1. What is the GCF of 820, 42, 31?

Answer: GCF of 820, 42, 31 is 1.

2. How to Find the GCF of 820, 42, 31

Answer: Greatest Common Factor(GCF) of 820, 42, 31 = 1

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

Step 2: Then multiply all the prime factors GCF(820, 42, 31) = 1.