Greatest Common Factor of 21, 20, 90, 237

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

• Greatest Common Factor of 21, 20, 90, 237 by common division method
• Greatest Common Factor of 21, 20, 90, 237 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 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

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 237

List of positive integer factors of 237 that divides 237 without a remainder.

1,3,79,237

Greatest Common Factor

We found the factors 21,20,90,237 . The biggest common factor number is the GCF number.
So the greatest common factor 21,20,90,237 is 1.

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

• GCF of 55, 82, 51, 143
• GCF of 87, 97, 24, 668
• GCF of 52, 20, 53, 107
• GCF of 37, 89, 14, 309
• GCF of 63, 59, 66, 737

1. What is the GCF of 21, 20, 90, 237?

Answer: GCF of 21, 20, 90, 237 is 1.

2. How to Find the GCF of 21, 20, 90, 237

Answer: Greatest Common Factor(GCF) of 21, 20, 90, 237 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 20, 90, 237) = 1.