What is the Greatest Common Factor of 39809 and 39820?

Greatest common factor (GCF) of 39809 and 39820 is 11.

GCF(39809,39820) = 11

We will now calculate the prime factors of 39809 and 39820, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39809 and 39820.

How to find the GCF of 39809 and 39820?

We will first find the prime factorization of 39809 and 39820. After we will calculate the factors of 39809 and 39820 and find the biggest common factor number .

Step-1: Prime Factorization of 39809

Prime factors of 39809 are 7, 11, 47. Prime factorization of 39809 in exponential form is:

39809 = 7¹ × 11² × 47¹

Step-2: Prime Factorization of 39820

Prime factors of 39820 are 2, 5, 11, 181. Prime factorization of 39820 in exponential form is:

39820 = 2² × 5¹ × 11¹ × 181¹

Step-3: Factors of 39809

List of positive integer factors of 39809 that divides 39809 without a remainder.

1, 7, 11, 47, 77, 121, 329, 517, 847, 3619, 5687

Step-4: Factors of 39820

List of positive integer factors of 39820 that divides 39809 without a remainder.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 181, 220, 362, 724, 905, 1810, 1991, 3620, 3982, 7964, 9955, 19910

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39809 and 39820. The biggest common factor number is the GCF number.
So the greatest common factor 39809 and 39820 is 11.

Also check out the Least Common Multiple of 39809 and 39820