What is the Greatest Common Factor of 21217 and 21221?

Greatest common factor (GCF) of 21217 and 21221 is 1.

GCF(21217,21221) = 1

We will now calculate the prime factors of 21217 and 21221, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21217 and 21221.

How to find the GCF of 21217 and 21221?

We will first find the prime factorization of 21217 and 21221. After we will calculate the factors of 21217 and 21221 and find the biggest common factor number .

Step-1: Prime Factorization of 21217

Prime factors of 21217 are 7, 433. Prime factorization of 21217 in exponential form is:

21217 = 7² × 433¹

Step-2: Prime Factorization of 21221

Prime factors of 21221 are 21221. Prime factorization of 21221 in exponential form is:

21221 = 21221¹

Step-3: Factors of 21217

List of positive integer factors of 21217 that divides 21217 without a remainder.

1, 7, 49, 433, 3031

Step-4: Factors of 21221

List of positive integer factors of 21221 that divides 21217 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21217 and 21221. The biggest common factor number is the GCF number.
So the greatest common factor 21217 and 21221 is 1.

Also check out the Least Common Multiple of 21217 and 21221