Greatest Common Factor of 243 and 247

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 243, 247 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 243 and 247 is 1.

GCF(243,247) = 1

GCF of 243 and 247

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

GCF of:
and

Greatest Common Factor of 243 and 247

GCF of 243 and 247 is 1

Prime Factorization of 243


3 243
3 81
3 27
3 9
3 3
1

Prime factors of 243 are 3. Prime factorization of 243 in exponential form is:

243 = 35

Prime Factorization of 247


13 247
19 19
1

Prime factors of 247 are 13.Prime factorization of 247 in exponential form is:

247 = 131×191

∴ So by taking common prime factors GCF of 243 and 247 is 1

Greatest Common Factor of 243 and 247 by matching factors method

Factors of 243

List of positive integer factors of 243 that divides 243 without a remainder.

1,3,9,27,81,243

Factors of 247

List of positive integer factors of 247 that divides 247 without a remainder.

1,13,19,247

Greatest Common Factor

We found the factors and prime factorization of 243 and 247. The biggest common factor number is the GCF number.
So the greatest common factor 243 and 247 is 1.

Also check out the Least Common Multiple of 243 and 247

Properties of GCF 243 and 247

(i) The GCF of 243 and 247 is associative

GCF of 243 and 247 = GCF of 247 and 243

Related Greatest Common Factor of 243

Related Greatest Common Factor of 247

Frequently Asked Questions on GCF of 243 and 247

1. What is the GCF of 243 and 247?

Answer: GCF of 243 and 247 is 1.

2. What are the Factors of 243?

Answer: Factors of 243 are 1, 3, 9, 27, 81, 243. There are 6 integers that are factors of 243. The greatest factor of 243 is 243.

3. What are the Factors of 247?

Answer: Factors of 247 are 1, 13, 19, 247. There are 4 integers that are factors of 247. The greatest factor of 247 is 247.

4. How to Find the GCF of 243 and 247?

Answer:

Greatest Common Factor of 243 and 247 = 1

Step 1: Find the prime factorization of 243

243 = 3 x 3 x 3 x 3 x 3

Step 2: Find the prime factorization of 247

247 = 13 x 19

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 243 and 247 is 1