What is the Greatest Common Factor of 3865 and 3870?

Greatest common factor (GCF) of 3865 and 3870 is 5.

GCF(3865,3870) = 5

We will now calculate the prime factors of 3865 and 3870, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 3865 and 3870.

How to find the GCF of 3865 and 3870?

We will first find the prime factorization of 3865 and 3870. After we will calculate the factors of 3865 and 3870 and find the biggest common factor number .

Step-1: Prime Factorization of 3865

Prime factors of 3865 are 5, 773. Prime factorization of 3865 in exponential form is:

3865 = 5¹ × 773¹

Step-2: 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-3: Factors of 3865

List of positive integer factors of 3865 that divides 3865 without a remainder.

1, 5, 773

Step-4: Factors of 3870

List of positive integer factors of 3870 that divides 3865 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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 3865 and 3870. The biggest common factor number is the GCF number.
So the greatest common factor 3865 and 3870 is 5.

Also check out the Least Common Multiple of 3865 and 3870