Greatest Common Factor of 21, 291, 397

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

• Greatest Common Factor of 21, 291, 397 by common division method
• Greatest Common Factor of 21, 291, 397 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 291

List of positive integer factors of 291 that divides 291 without a remainder.

1,3,97,291

Factors of 397

List of positive integer factors of 397 that divides 397 without a remainder.

1,397

Greatest Common Factor

We found the factors 21,291,397 . The biggest common factor number is the GCF number.
So the greatest common factor 21,291,397 is 1.

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

• GCF of 78, 768, 679
• GCF of 85, 868, 143
• GCF of 10, 271, 118
• GCF of 37, 757, 226
• GCF of 45, 389, 913

1. What is the GCF of 21, 291, 397?

Answer: GCF of 21, 291, 397 is 1.

2. How to Find the GCF of 21, 291, 397

Answer: Greatest Common Factor(GCF) of 21, 291, 397 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 291, 397) = 1.