Greatest Common Factor of 1220 and 1228

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 1220, 1228 i.e. 4 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 1220 and 1228 is 4.

GCF(1220,1228) = 4

GCF of 1220 and 1228

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

GCF of:
and

Greatest Common Factor of 1220 and 1228

GCF of 1220 and 1228 is 4

Prime Factorization of 1220


2 1220
2 610
5 305
61 61
1

Prime factors of 1220 are 2,5,61. Prime factorization of 1220 in exponential form is:

1220 = 22×51×611

Prime Factorization of 1228


2 1228
2 614
307 307
1

Prime factors of 1228 are 2,307. Prime factorization of 1228 in exponential form is:

1228 = 22×3071

∴ So by taking common prime factors GCF of 1220 and 1228 is 4

Greatest Common Factor of 1220 and 1228 by matching factors method

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

Factors of 1228

List of positive integer factors of 1228 that divides 1228 without a remainder.

1,2,4,307,614,1228

Greatest Common Factor

We found the factors and prime factorization of 1220 and 1228. The biggest common factor number is the GCF number.
So the greatest common factor 1220 and 1228 is 4.

Also check out the Least Common Multiple of 1220 and 1228

Properties of GCF 1220 and 1228

(i) The GCF of 1220 and 1228 is associative

GCF of 1220 and 1228 = GCF of 1228 and 1220

Related Greatest Common Factor of 1220

Related Greatest Common Factor of 1228

Frequently Asked Questions on GCF of 1220 and 1228

1. What is the GCF of 1220 and 1228?

Answer: GCF of 1220 and 1228 is 4.

2. 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.

3. What are the Factors of 1228?

Answer: Factors of 1228 are 1, 2, 4, 307, 614, 1228. There are 6 integers that are factors of 1228. The greatest factor of 1228 is 1228.

4. How to Find the GCF of 1220 and 1228?

Answer:

Greatest Common Factor of 1220 and 1228 = 4

Step 1: Find the prime factorization of 1220

1220 = 2 x 2 x 5 x 61

Step 2: Find the prime factorization of 1228

1228 = 2 x 2 x 307

Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:

GCF = 2 x 2 = 4

Step 4: Therefore, the greatest common factor of 1220 and 1228 is 4