What is the Greatest Common Factor of 40815 and 40820?

Greatest common factor (GCF) of 40815 and 40820 is 5.

GCF(40815,40820) = 5

We will now calculate the prime factors of 40815 and 40820, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 40815 and 40820.

How to find the GCF of 40815 and 40820?

We will first find the prime factorization of 40815 and 40820. After we will calculate the factors of 40815 and 40820 and find the biggest common factor number .

Step-1: Prime Factorization of 40815

Prime factors of 40815 are 3, 5, 907. Prime factorization of 40815 in exponential form is:

40815 = 3² × 5¹ × 907¹

Step-2: Prime Factorization of 40820

Prime factors of 40820 are 2, 5, 13, 157. Prime factorization of 40820 in exponential form is:

40820 = 2² × 5¹ × 13¹ × 157¹

Step-3: Factors of 40815

List of positive integer factors of 40815 that divides 40815 without a remainder.

1, 3, 5, 9, 15, 45, 907, 2721, 4535, 8163, 13605

Step-4: Factors of 40820

List of positive integer factors of 40820 that divides 40815 without a remainder.

1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 628, 785, 1570, 2041, 3140, 4082, 8164, 10205, 20410

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 40815 and 40820. The biggest common factor number is the GCF number.
So the greatest common factor 40815 and 40820 is 5.

Also check out the Least Common Multiple of 40815 and 40820