Greatest Common Factor of 20, 86, 71, 420

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

• Greatest Common Factor of 20, 86, 71, 420 by common division method
• Greatest Common Factor of 20, 86, 71, 420 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 86

List of positive integer factors of 86 that divides 86 without a remainder.

1,2,43,86

Factors of 71

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

1,71

Factors of 420

List of positive integer factors of 420 that divides 420 without a remainder.

1,2,3,4,5,6,7,10,12,14,15,20,21,28,30,35,42,60,70,84,105,140,210,420

Greatest Common Factor

We found the factors 20,86,71,420 . The biggest common factor number is the GCF number.
So the greatest common factor 20,86,71,420 is 1.

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

• GCF of 14, 59, 67, 964
• GCF of 24, 42, 51, 688
• GCF of 26, 60, 39, 284
• GCF of 25, 25, 31, 317
• GCF of 68, 29, 95, 676

1. What is the GCF of 20, 86, 71, 420?

Answer: GCF of 20, 86, 71, 420 is 1.

2. How to Find the GCF of 20, 86, 71, 420

Answer: Greatest Common Factor(GCF) of 20, 86, 71, 420 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 86, 71, 420) = 1.