Greatest Common Factor of 221 and 225

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 221, 225 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 221 and 225 is 1.

GCF(221,225) = 1

GCF of 221 and 225

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

GCF of:
and

Greatest Common Factor of 221 and 225

GCF of 221 and 225 is 1

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

Prime Factorization of 225


3 225
3 75
5 25
5 5
1

Prime factors of 225 are 3,5. Prime factorization of 225 in exponential form is:

225 = 32×52

∴ So by taking common prime factors GCF of 221 and 225 is 1

Greatest Common Factor of 221 and 225 by matching factors method

Factors of 221

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

1,13,17,221

Factors of 225

List of positive integer factors of 225 that divides 225 without a remainder.

1,3,5,9,15,25,45,75,225

Greatest Common Factor

We found the factors and prime factorization of 221 and 225. The biggest common factor number is the GCF number.
So the greatest common factor 221 and 225 is 1.

Also check out the Least Common Multiple of 221 and 225

Properties of GCF 221 and 225

(i) The GCF of 221 and 225 is associative

GCF of 221 and 225 = GCF of 225 and 221

Related Greatest Common Factor of 221

Related Greatest Common Factor of 225

Frequently Asked Questions on GCF of 221 and 225

1. What is the GCF of 221 and 225?

Answer: GCF of 221 and 225 is 1.

2. 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.

3. What are the Factors of 225?

Answer: Factors of 225 are 1, 3, 5, 9, 15, 25, 45, 75, 225. There are 9 integers that are factors of 225. The greatest factor of 225 is 225.

4. How to Find the GCF of 221 and 225?

Answer:

Greatest Common Factor of 221 and 225 = 1

Step 1: Find the prime factorization of 221

221 = 13 x 17

Step 2: Find the prime factorization of 225

225 = 3 x 3 x 5 x 5

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 221 and 225 is 1