What is the Greatest Common Factor of 10815 and 10820?

Greatest common factor (GCF) of 10815 and 10820 is 5.

GCF(10815,10820) = 5

We will now calculate the prime factors of 10815 and 10820, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 10815 and 10820.

How to find the GCF of 10815 and 10820?

We will first find the prime factorization of 10815 and 10820. After we will calculate the factors of 10815 and 10820 and find the biggest common factor number .

Step-1: Prime Factorization of 10815

Prime factors of 10815 are 3, 5, 7, 103. Prime factorization of 10815 in exponential form is:

10815 = 3¹ × 5¹ × 7¹ × 103¹

Step-2: Prime Factorization of 10820

Prime factors of 10820 are 2, 5, 541. Prime factorization of 10820 in exponential form is:

10820 = 2² × 5¹ × 541¹

Step-3: Factors of 10815

List of positive integer factors of 10815 that divides 10815 without a remainder.

1, 3, 5, 7, 15, 21, 35, 103, 105, 309, 515, 721, 1545, 2163, 3605

Step-4: Factors of 10820

List of positive integer factors of 10820 that divides 10815 without a remainder.

1, 2, 4, 5, 10, 20, 541, 1082, 2164, 2705, 5410

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 10815 and 10820. The biggest common factor number is the GCF number.
So the greatest common factor 10815 and 10820 is 5.

Also check out the Least Common Multiple of 10815 and 10820