Greatest Common Factor of 13, 21, 397

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

• Greatest Common Factor of 13, 21, 397 by common division method
• Greatest Common Factor of 13, 21, 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 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Factors of 21

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

1,3,7,21

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 13,21,397 . The biggest common factor number is the GCF number.
So the greatest common factor 13,21,397 is 1.

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

• GCF of 21, 40, 977
• GCF of 31, 18, 577
• GCF of 32, 10, 289
• GCF of 51, 41, 818
• GCF of 13, 21, 853

1. What is the GCF of 13, 21, 397?

Answer: GCF of 13, 21, 397 is 1.

2. How to Find the GCF of 13, 21, 397

Answer: Greatest Common Factor(GCF) of 13, 21, 397 = 1

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

Step 2: Then multiply all the prime factors GCF(13, 21, 397) = 1.