What is the Greatest Common Factor of 19620 and 19636?

Greatest common factor (GCF) of 19620 and 19636 is 4.

GCF(19620,19636) = 4

We will now calculate the prime factors of 19620 and 19636, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19620 and 19636.

How to find the GCF of 19620 and 19636?

We will first find the prime factorization of 19620 and 19636. After we will calculate the factors of 19620 and 19636 and find the biggest common factor number .

Step-1: Prime Factorization of 19620

Prime factors of 19620 are 2, 3, 5, 109. Prime factorization of 19620 in exponential form is:

19620 = 2² × 3² × 5¹ × 109¹

Step-2: Prime Factorization of 19636

Prime factors of 19636 are 2, 4909. Prime factorization of 19636 in exponential form is:

19636 = 2² × 4909¹

Step-3: Factors of 19620

List of positive integer factors of 19620 that divides 19620 without a remainder.

1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 109, 180, 218, 327, 436, 545, 654, 981, 1090, 1308, 1635, 1962, 2180, 3270, 3924, 4905, 6540, 9810

Step-4: Factors of 19636

List of positive integer factors of 19636 that divides 19620 without a remainder.

1, 2, 4, 4909, 9818

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19620 and 19636. The biggest common factor number is the GCF number.
So the greatest common factor 19620 and 19636 is 4.

Also check out the Least Common Multiple of 19620 and 19636