What is the Greatest Common Factor of 19809 and 19827?

Greatest common factor (GCF) of 19809 and 19827 is 9.

GCF(19809,19827) = 9

We will now calculate the prime factors of 19809 and 19827, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19809 and 19827.

How to find the GCF of 19809 and 19827?

We will first find the prime factorization of 19809 and 19827. After we will calculate the factors of 19809 and 19827 and find the biggest common factor number .

Step-1: Prime Factorization of 19809

Prime factors of 19809 are 3, 31, 71. Prime factorization of 19809 in exponential form is:

19809 = 3² × 31¹ × 71¹

Step-2: Prime Factorization of 19827

Prime factors of 19827 are 3, 2203. Prime factorization of 19827 in exponential form is:

19827 = 3² × 2203¹

Step-3: Factors of 19809

List of positive integer factors of 19809 that divides 19809 without a remainder.

1, 3, 9, 31, 71, 93, 213, 279, 639, 2201, 6603

Step-4: Factors of 19827

List of positive integer factors of 19827 that divides 19809 without a remainder.

1, 3, 9, 2203, 6609

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19809 and 19827. The biggest common factor number is the GCF number.
So the greatest common factor 19809 and 19827 is 9.

Also check out the Least Common Multiple of 19809 and 19827