Greatest Common Factor of 20, 71, 90, 40

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

• Greatest Common Factor of 20, 71, 90, 40 by common division method
• Greatest Common Factor of 20, 71, 90, 40 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 71

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

1,71

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 40

List of positive integer factors of 40 that divides 40 without a remainder.

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

Greatest Common Factor

We found the factors 20,71,90,40 . The biggest common factor number is the GCF number.
So the greatest common factor 20,71,90,40 is 1.

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

• GCF of 82, 37, 90, 16
• GCF of 41, 54, 29, 86
• GCF of 50, 60, 26, 92
• GCF of 54, 27, 40, 81
• GCF of 10, 35, 78, 71

1. What is the GCF of 20, 71, 90, 40?

Answer: GCF of 20, 71, 90, 40 is 1.

2. How to Find the GCF of 20, 71, 90, 40

Answer: Greatest Common Factor(GCF) of 20, 71, 90, 40 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 71, 90, 40) = 1.