What is the Greatest Common Factor of 21203 and 21213?

Greatest common factor (GCF) of 21203 and 21213 is 1.

GCF(21203,21213) = 1

We will now calculate the prime factors of 21203 and 21213, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21203 and 21213.

How to find the GCF of 21203 and 21213?

We will first find the prime factorization of 21203 and 21213. After we will calculate the factors of 21203 and 21213 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 21213

Prime factors of 21213 are 3, 2357. Prime factorization of 21213 in exponential form is:

21213 = 3² × 2357¹

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 21213

List of positive integer factors of 21213 that divides 21203 without a remainder.

1, 3, 9, 2357, 7071

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21203 and 21213. The biggest common factor number is the GCF number.
So the greatest common factor 21203 and 21213 is 1.

Also check out the Least Common Multiple of 21203 and 21213