What is the Greatest Common Factor of 3870 and 3885?

Greatest common factor (GCF) of 3870 and 3885 is 15.

GCF(3870,3885) = 15

We will now calculate the prime factors of 3870 and 3885, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 3870 and 3885.

How to find the GCF of 3870 and 3885?

We will first find the prime factorization of 3870 and 3885. After we will calculate the factors of 3870 and 3885 and find the biggest common factor number .

Step-1: Prime Factorization of 3870

Prime factors of 3870 are 2, 3, 5, 43. Prime factorization of 3870 in exponential form is:

3870 = 2¹ × 3² × 5¹ × 43¹

Step-2: Prime Factorization of 3885

Prime factors of 3885 are 3, 5, 7, 37. Prime factorization of 3885 in exponential form is:

3885 = 3¹ × 5¹ × 7¹ × 37¹

Step-3: Factors of 3870

List of positive integer factors of 3870 that divides 3870 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 43, 45, 86, 90, 129, 215, 258, 387, 430, 645, 774, 1290, 1935

Step-4: Factors of 3885

List of positive integer factors of 3885 that divides 3870 without a remainder.

1, 3, 5, 7, 15, 21, 35, 37, 105, 111, 185, 259, 555, 777, 1295

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 3870 and 3885. The biggest common factor number is the GCF number.
So the greatest common factor 3870 and 3885 is 15.

Also check out the Least Common Multiple of 3870 and 3885