What is the Greatest Common Factor of 20215 and 20221?

Greatest common factor (GCF) of 20215 and 20221 is 1.

GCF(20215,20221) = 1

We will now calculate the prime factors of 20215 and 20221, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20215 and 20221.

How to find the GCF of 20215 and 20221?

We will first find the prime factorization of 20215 and 20221. After we will calculate the factors of 20215 and 20221 and find the biggest common factor number .

Step-1: Prime Factorization of 20215

Prime factors of 20215 are 5, 13, 311. Prime factorization of 20215 in exponential form is:

20215 = 5¹ × 13¹ × 311¹

Step-2: Prime Factorization of 20221

Prime factors of 20221 are 73, 277. Prime factorization of 20221 in exponential form is:

20221 = 73¹ × 277¹

Step-3: Factors of 20215

List of positive integer factors of 20215 that divides 20215 without a remainder.

1, 5, 13, 65, 311, 1555, 4043

Step-4: Factors of 20221

List of positive integer factors of 20221 that divides 20215 without a remainder.

1, 73, 277

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20215 and 20221. The biggest common factor number is the GCF number.
So the greatest common factor 20215 and 20221 is 1.

Also check out the Least Common Multiple of 20215 and 20221