What is the Greatest Common Factor of 19909 and 19921?

Greatest common factor (GCF) of 19909 and 19921 is 1.

GCF(19909,19921) = 1

We will now calculate the prime factors of 19909 and 19921, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19909 and 19921.

How to find the GCF of 19909 and 19921?

We will first find the prime factorization of 19909 and 19921. After we will calculate the factors of 19909 and 19921 and find the biggest common factor number .

Step-1: Prime Factorization of 19909

Prime factors of 19909 are 43, 463. Prime factorization of 19909 in exponential form is:

19909 = 43¹ × 463¹

Step-2: Prime Factorization of 19921

Prime factors of 19921 are 11, 1811. Prime factorization of 19921 in exponential form is:

19921 = 11¹ × 1811¹

Step-3: Factors of 19909

List of positive integer factors of 19909 that divides 19909 without a remainder.

1, 43, 463

Step-4: Factors of 19921

List of positive integer factors of 19921 that divides 19909 without a remainder.

1, 11, 1811

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19909 and 19921. The biggest common factor number is the GCF number.
So the greatest common factor 19909 and 19921 is 1.

Also check out the Least Common Multiple of 19909 and 19921