Greatest Common Factor of 21, 991, 671

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

• Greatest Common Factor of 21, 991, 671 by common division method
• Greatest Common Factor of 21, 991, 671 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 991

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

1,991

Factors of 671

List of positive integer factors of 671 that divides 671 without a remainder.

1,11,61,671

Greatest Common Factor

We found the factors 21,991,671 . The biggest common factor number is the GCF number.
So the greatest common factor 21,991,671 is 1.

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

• GCF of 54, 576, 118
• GCF of 92, 319, 786
• GCF of 67, 536, 146
• GCF of 60, 912, 978
• GCF of 44, 611, 114

1. What is the GCF of 21, 991, 671?

Answer: GCF of 21, 991, 671 is 1.

2. How to Find the GCF of 21, 991, 671

Answer: Greatest Common Factor(GCF) of 21, 991, 671 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 991, 671) = 1.