What is the Greatest Common Factor of 19621 and 19638?

Greatest common factor (GCF) of 19621 and 19638 is 1.

GCF(19621,19638) = 1

We will now calculate the prime factors of 19621 and 19638, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19621 and 19638.

How to find the GCF of 19621 and 19638?

We will first find the prime factorization of 19621 and 19638. After we will calculate the factors of 19621 and 19638 and find the biggest common factor number .

Step-1: Prime Factorization of 19621

Prime factors of 19621 are 7, 2803. Prime factorization of 19621 in exponential form is:

19621 = 7¹ × 2803¹

Step-2: Prime Factorization of 19638

Prime factors of 19638 are 2, 3, 1091. Prime factorization of 19638 in exponential form is:

19638 = 2¹ × 3² × 1091¹

Step-3: Factors of 19621

List of positive integer factors of 19621 that divides 19621 without a remainder.

1, 7, 2803

Step-4: Factors of 19638

List of positive integer factors of 19638 that divides 19621 without a remainder.

1, 2, 3, 6, 9, 18, 1091, 2182, 3273, 6546, 9819

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19621 and 19638. The biggest common factor number is the GCF number.
So the greatest common factor 19621 and 19638 is 1.

Also check out the Least Common Multiple of 19621 and 19638