Greatest Common Factor of 391 and 397

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Make use of GCF Calculator to quickly find the Greatest Common Factor of numbers 391, 397 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 391 and 397 is 1.

GCF(391,397) = 1

GCF of 391 and 397

Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;

GCF of:
and

Greatest Common Factor of 391 and 397

GCF of 391 and 397 is 1

Prime Factorization of 391


17 391
23 23
1

Prime factors of 391 are 17,23. Prime factorization of 391 in exponential form is:

391 = 171×231

Prime Factorization of 397


397 397
1

Prime factors of 397 are 397. Prime factorization of 397 in exponential form is:

397 = 3971

∴ So by taking common prime factors GCF of 391 and 397 is 1

Greatest Common Factor of 391 and 397 by matching factors method

Factors of 391

List of positive integer factors of 391 that divides 391 without a remainder.

1,17,23,391

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 and prime factorization of 391 and 397. The biggest common factor number is the GCF number.
So the greatest common factor 391 and 397 is 1.

Also check out the Least Common Multiple of 391 and 397

Properties of GCF 391 and 397

(i) The GCF of 391 and 397 is associative

GCF of 391 and 397 = GCF of 397 and 391

Related Greatest Common Factor of 391

Related Greatest Common Factor of 397

Frequently Asked Questions on GCF of 391 and 397

1. What is the GCF of 391 and 397?

Answer: GCF of 391 and 397 is 1.

2. What are the Factors of 391?

Answer: Factors of 391 are 1, 17, 23, 391. There are 4 integers that are factors of 391. The greatest factor of 391 is 391.

3. What are the Factors of 397?

Answer: Factors of 397 are 1, 397. There are 2 integers that are factors of 397. The greatest factor of 397 is 397.

4. How to Find the GCF of 391 and 397?

Answer:

Greatest Common Factor of 391 and 397 = 1

Step 1: Find the prime factorization of 391

391 = 17 x 23

Step 2: Find the prime factorization of 397

397 = 397

Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:

GCF = = 1

Step 4: Therefore, the greatest common factor of 391 and 397 is 1