Greatest Common Factor of 20, 89, 991, 621

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

• Greatest Common Factor of 20, 89, 991, 621 by common division method
• Greatest Common Factor of 20, 89, 991, 621 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 89

List of positive integer factors of 89 that divides 89 without a remainder.

1,89

Factors of 991

List of positive integer factors of 991 that divides 991 without a remainder.

1,991

Factors of 621

List of positive integer factors of 621 that divides 621 without a remainder.

1,3,9,23,27,69,207,621

Greatest Common Factor

We found the factors 20,89,991,621 . The biggest common factor number is the GCF number.
So the greatest common factor 20,89,991,621 is 1.

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

• GCF of 89, 42, 179, 463
• GCF of 58, 14, 309, 418
• GCF of 26, 18, 702, 885
• GCF of 36, 20, 305, 803
• GCF of 98, 81, 808, 872

1. What is the GCF of 20, 89, 991, 621?

Answer: GCF of 20, 89, 991, 621 is 1.

2. How to Find the GCF of 20, 89, 991, 621

Answer: Greatest Common Factor(GCF) of 20, 89, 991, 621 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 89, 991, 621) = 1.