What is the Greatest Common Factor of 38815 and 38820?

Greatest common factor (GCF) of 38815 and 38820 is 5.

GCF(38815,38820) = 5

We will now calculate the prime factors of 38815 and 38820, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 38815 and 38820.

How to find the GCF of 38815 and 38820?

We will first find the prime factorization of 38815 and 38820. After we will calculate the factors of 38815 and 38820 and find the biggest common factor number .

Step-1: Prime Factorization of 38815

Prime factors of 38815 are 5, 7, 1109. Prime factorization of 38815 in exponential form is:

38815 = 5¹ × 7¹ × 1109¹

Step-2: Prime Factorization of 38820

Prime factors of 38820 are 2, 3, 5, 647. Prime factorization of 38820 in exponential form is:

38820 = 2² × 3¹ × 5¹ × 647¹

Step-3: Factors of 38815

List of positive integer factors of 38815 that divides 38815 without a remainder.

1, 5, 7, 35, 1109, 5545, 7763

Step-4: Factors of 38820

List of positive integer factors of 38820 that divides 38815 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 647, 1294, 1941, 2588, 3235, 3882, 6470, 7764, 9705, 12940, 19410

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 38815 and 38820. The biggest common factor number is the GCF number.
So the greatest common factor 38815 and 38820 is 5.

Also check out the Least Common Multiple of 38815 and 38820