Greatest Common Factor of 217 and 221

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

Greatest common factor (GCF) of 217 and 221 is 1.

GCF(217,221) = 1

GCF of 217 and 221

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

GCF of:
and

Greatest Common Factor of 217 and 221

GCF of 217 and 221 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 221


13 221
17 17
1

Prime factors of 221 are 13,17. Prime factorization of 221 in exponential form is:

221 = 131×171

∴ So by taking common prime factors GCF of 217 and 221 is 1

Greatest Common Factor of 217 and 221 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 221

List of positive integer factors of 221 that divides 221 without a remainder.

1,13,17,221

Greatest Common Factor

We found the factors and prime factorization of 217 and 221. The biggest common factor number is the GCF number.
So the greatest common factor 217 and 221 is 1.

Also check out the Least Common Multiple of 217 and 221

Properties of GCF 217 and 221

(i) The GCF of 217 and 221 is associative

GCF of 217 and 221 = GCF of 221 and 217

Related Greatest Common Factor of 217

Related Greatest Common Factor of 221

Frequently Asked Questions on GCF of 217 and 221

1. What is the GCF of 217 and 221?

Answer: GCF of 217 and 221 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 221?

Answer: Factors of 221 are 1, 13, 17, 221. There are 4 integers that are factors of 221. The greatest factor of 221 is 221.

4. How to Find the GCF of 217 and 221?

Answer:

Greatest Common Factor of 217 and 221 = 1

Step 1: Find the prime factorization of 217

217 = 7 x 31

Step 2: Find the prime factorization of 221

221 = 13 x 17

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 221 is 1