Greatest Common Factor of 20, 31, 16, 217

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

• Greatest Common Factor of 20, 31, 16, 217 by common division method
• Greatest Common Factor of 20, 31, 16, 217 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 31

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

1,31

Factors of 16

List of positive integer factors of 16 that divides 16 without a remainder.

1,2,4,8,16

Factors of 217

List of positive integer factors of 217 that divides 217 without a remainder.

1,7,31,217

Greatest Common Factor

We found the factors 20,31,16,217 . The biggest common factor number is the GCF number.
So the greatest common factor 20,31,16,217 is 1.

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

• GCF of 51, 62, 29, 889
• GCF of 77, 17, 35, 242
• GCF of 59, 41, 51, 793
• GCF of 53, 16, 77, 812
• GCF of 13, 21, 19, 257

1. What is the GCF of 20, 31, 16, 217?

Answer: GCF of 20, 31, 16, 217 is 1.

2. How to Find the GCF of 20, 31, 16, 217

Answer: Greatest Common Factor(GCF) of 20, 31, 16, 217 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 31, 16, 217) = 1.