What is the Greatest Common Factor of 19820 and 19830?

Greatest common factor (GCF) of 19820 and 19830 is 10.

GCF(19820,19830) = 10

We will now calculate the prime factors of 19820 and 19830, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19820 and 19830.

How to find the GCF of 19820 and 19830?

We will first find the prime factorization of 19820 and 19830. After we will calculate the factors of 19820 and 19830 and find the biggest common factor number .

Step-1: Prime Factorization of 19820

Prime factors of 19820 are 2, 5, 991. Prime factorization of 19820 in exponential form is:

19820 = 2² × 5¹ × 991¹

Step-2: Prime Factorization of 19830

Prime factors of 19830 are 2, 3, 5, 661. Prime factorization of 19830 in exponential form is:

19830 = 2¹ × 3¹ × 5¹ × 661¹

Step-3: Factors of 19820

List of positive integer factors of 19820 that divides 19820 without a remainder.

1, 2, 4, 5, 10, 20, 991, 1982, 3964, 4955, 9910

Step-4: Factors of 19830

List of positive integer factors of 19830 that divides 19820 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 661, 1322, 1983, 3305, 3966, 6610, 9915

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19820 and 19830. The biggest common factor number is the GCF number.
So the greatest common factor 19820 and 19830 is 10.

Also check out the Least Common Multiple of 19820 and 19830