What is the Greatest Common Factor of 18215 and 18220?

Greatest common factor (GCF) of 18215 and 18220 is 5.

GCF(18215,18220) = 5

We will now calculate the prime factors of 18215 and 18220, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18215 and 18220.

How to find the GCF of 18215 and 18220?

We will first find the prime factorization of 18215 and 18220. After we will calculate the factors of 18215 and 18220 and find the biggest common factor number .

Step-1: Prime Factorization of 18215

Prime factors of 18215 are 5, 3643. Prime factorization of 18215 in exponential form is:

18215 = 5¹ × 3643¹

Step-2: Prime Factorization of 18220

Prime factors of 18220 are 2, 5, 911. Prime factorization of 18220 in exponential form is:

18220 = 2² × 5¹ × 911¹

Step-3: Factors of 18215

List of positive integer factors of 18215 that divides 18215 without a remainder.

1, 5, 3643

Step-4: Factors of 18220

List of positive integer factors of 18220 that divides 18215 without a remainder.

1, 2, 4, 5, 10, 20, 911, 1822, 3644, 4555, 9110

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18215 and 18220. The biggest common factor number is the GCF number.
So the greatest common factor 18215 and 18220 is 5.

Also check out the Least Common Multiple of 18215 and 18220