What is the Greatest Common Factor of 21203 and 21221?

Greatest common factor (GCF) of 21203 and 21221 is 1.

GCF(21203,21221) = 1

We will now calculate the prime factors of 21203 and 21221, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21203 and 21221.

How to find the GCF of 21203 and 21221?

We will first find the prime factorization of 21203 and 21221. After we will calculate the factors of 21203 and 21221 and find the biggest common factor number .

Step-1: Prime Factorization of 21203

Prime factors of 21203 are 7, 13, 233. Prime factorization of 21203 in exponential form is:

21203 = 7¹ × 13¹ × 233¹

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 21203

List of positive integer factors of 21203 that divides 21203 without a remainder.

1, 7, 13, 91, 233, 1631, 3029

Step-4: Factors of 21221

List of positive integer factors of 21221 that divides 21203 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21203 and 21221. The biggest common factor number is the GCF number.
So the greatest common factor 21203 and 21221 is 1.

Also check out the Least Common Multiple of 21203 and 21221