Greatest Common Factor of 1240 and 1247

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 1240, 1247 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 1240 and 1247 is 1.

GCF(1240,1247) = 1

GCF of 1240 and 1247

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

GCF of:
and

Greatest Common Factor of 1240 and 1247

GCF of 1240 and 1247 is 1

Prime Factorization of 1240


2 1240
2 620
2 310
5 155
31 31
1

Prime factors of 1240 are 2,5,31. Prime factorization of 1240 in exponential form is:

1240 = 23×51×311

Prime Factorization of 1247


29 1247
43 43
1

Prime factors of 1247 are 29,43. Prime factorization of 1247 in exponential form is:

1247 = 291×431

∴ So by taking common prime factors GCF of 1240 and 1247 is 1

Greatest Common Factor of 1240 and 1247 by matching factors method

Factors of 1240

List of positive integer factors of 1240 that divides 1240 without a remainder.

1,2,4,5,8,10,20,31,40,62,124,155,248,310,620,1240

Factors of 1247

List of positive integer factors of 1247 that divides 1247 without a remainder.

1,29,43,1247

Greatest Common Factor

We found the factors and prime factorization of 1240 and 1247. The biggest common factor number is the GCF number.
So the greatest common factor 1240 and 1247 is 1.

Also check out the Least Common Multiple of 1240 and 1247

Properties of GCF 1240 and 1247

(i) The GCF of 1240 and 1247 is associative

GCF of 1240 and 1247 = GCF of 1247 and 1240

Related Greatest Common Factor of 1240

Related Greatest Common Factor of 1247

Frequently Asked Questions on GCF of 1240 and 1247

1. What is the GCF of 1240 and 1247?

Answer: GCF of 1240 and 1247 is 1.

2. What are the Factors of 1240?

Answer: Factors of 1240 are 1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240. There are 16 integers that are factors of 1240. The greatest factor of 1240 is 1240.

3. What are the Factors of 1247?

Answer: Factors of 1247 are 1, 29, 43, 1247. There are 4 integers that are factors of 1247. The greatest factor of 1247 is 1247.

4. How to Find the GCF of 1240 and 1247?

Answer:

Greatest Common Factor of 1240 and 1247 = 1

Step 1: Find the prime factorization of 1240

1240 = 2 x 2 x 2 x 5 x 31

Step 2: Find the prime factorization of 1247

1247 = 29 x 43

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 1240 and 1247 is 1