Greatest Common Factor of 42, 71, 820

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

• Greatest Common Factor of 42, 71, 820 by common division method
• Greatest Common Factor of 42, 71, 820 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 42

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

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

Factors of 71

List of positive integer factors of 71 that divides 71 without a remainder.

1,71

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

Greatest Common Factor

We found the factors 42,71,820 . The biggest common factor number is the GCF number.
So the greatest common factor 42,71,820 is 1.

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

• GCF of 19, 62, 630
• GCF of 20, 98, 781
• GCF of 27, 62, 616
• GCF of 31, 63, 940
• GCF of 73, 93, 391

1. What is the GCF of 42, 71, 820?

Answer: GCF of 42, 71, 820 is 1.

2. How to Find the GCF of 42, 71, 820

Answer: Greatest Common Factor(GCF) of 42, 71, 820 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 71, 820) = 1.