Greatest Common Factor of 217 and 220

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 217, 220 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 217 and 220 is 1.

GCF(217,220) = 1

GCF of 217 and 220

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

GCF of:
and

Greatest Common Factor of 217 and 220

GCF of 217 and 220 is 1

Prime Factorization of 217


7 217
31 31
1

Prime factors of 217 are 7,31. Prime factorization of 217 in exponential form is:

217 = 71×311

Prime Factorization of 220


2 220
2 110
5 55
11 11
1

Prime factors of 220 are 2,5,11. Prime factorization of 220 in exponential form is:

220 = 22×51×111

∴ So by taking common prime factors GCF of 217 and 220 is 1

Greatest Common Factor of 217 and 220 by matching factors method

Factors of 217

List of positive integer factors of 217 that divides 217 without a remainder.

1,7,31,217

Factors of 220

List of positive integer factors of 220 that divides 220 without a remainder.

1,2,4,5,10,11,20,22,44,55,110,220

Greatest Common Factor

We found the factors and prime factorization of 217 and 220. The biggest common factor number is the GCF number.
So the greatest common factor 217 and 220 is 1.

Also check out the Least Common Multiple of 217 and 220

Properties of GCF 217 and 220

(i) The GCF of 217 and 220 is associative

GCF of 217 and 220 = GCF of 220 and 217

Related Greatest Common Factor of 217

Related Greatest Common Factor of 220

Frequently Asked Questions on GCF of 217 and 220

1. What is the GCF of 217 and 220?

Answer: GCF of 217 and 220 is 1.

2. What are the Factors of 217?

Answer: Factors of 217 are 1, 7, 31, 217. There are 4 integers that are factors of 217. The greatest factor of 217 is 217.

3. What are the Factors of 220?

Answer: Factors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220. There are 12 integers that are factors of 220. The greatest factor of 220 is 220.

4. How to Find the GCF of 217 and 220?

Answer:

Greatest Common Factor of 217 and 220 = 1

Step 1: Find the prime factorization of 217

217 = 7 x 31

Step 2: Find the prime factorization of 220

220 = 2 x 2 x 5 x 11

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 217 and 220 is 1