Greatest Common Factor of 1217 and 1220

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 1217, 1220 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 1217 and 1220 is 1.

GCF(1217,1220) = 1

GCF of 1217 and 1220

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

GCF of:
and

Greatest Common Factor of 1217 and 1220

GCF of 1217 and 1220 is 1

Prime Factorization of 1217


1217 1217
1

Prime factors of 1217 are 1217. Prime factorization of 1217 in exponential form is:

1217 = 12171

Prime Factorization of 1220


2 1220
2 610
5 305
61 61
1

Prime factors of 1220 are 2.Prime factorization of 1220 in exponential form is:

1220 = 22×51×611

∴ So by taking common prime factors GCF of 1217 and 1220 is 1

Greatest Common Factor of 1217 and 1220 by matching factors method

Factors of 1217

List of positive integer factors of 1217 that divides 1217 without a remainder.

1,1217

Factors of 1220

List of positive integer factors of 1220 that divides 1220 without a remainder.

1,2,4,5,10,20,61,122,244,305,610,1220

Greatest Common Factor

We found the factors and prime factorization of 1217 and 1220. The biggest common factor number is the GCF number.
So the greatest common factor 1217 and 1220 is 1.

Also check out the Least Common Multiple of 1217 and 1220

Properties of GCF 1217 and 1220

(i) The GCF of 1217 and 1220 is associative

GCF of 1217 and 1220 = GCF of 1220 and 1217

Related Greatest Common Factor of 1217

Related Greatest Common Factor of 1220

Frequently Asked Questions on GCF of 1217 and 1220

1. What is the GCF of 1217 and 1220?

Answer: GCF of 1217 and 1220 is 1.

2. What are the Factors of 1217?

Answer: Factors of 1217 are 1, 1217. There are 2 integers that are factors of 1217. The greatest factor of 1217 is 1217.

3. What are the Factors of 1220?

Answer: Factors of 1220 are 1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220. There are 12 integers that are factors of 1220. The greatest factor of 1220 is 1220.

4. How to Find the GCF of 1217 and 1220?

Answer:

Greatest Common Factor of 1217 and 1220 = 1

Step 1: Find the prime factorization of 1217

1217 = 1217

Step 2: Find the prime factorization of 1220

1220 = 2 x 2 x 5 x 61

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 1217 and 1220 is 1