What is the Greatest Common Factor of 15870 and 15885?

Greatest common factor (GCF) of 15870 and 15885 is 15.

GCF(15870,15885) = 15

We will now calculate the prime factors of 15870 and 15885, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15870 and 15885.

How to find the GCF of 15870 and 15885?

We will first find the prime factorization of 15870 and 15885. After we will calculate the factors of 15870 and 15885 and find the biggest common factor number .

Step-1: Prime Factorization of 15870

Prime factors of 15870 are 2, 3, 5, 23. Prime factorization of 15870 in exponential form is:

15870 = 2¹ × 3¹ × 5¹ × 23²

Step-2: Prime Factorization of 15885

Prime factors of 15885 are 3, 5, 353. Prime factorization of 15885 in exponential form is:

15885 = 3² × 5¹ × 353¹

Step-3: Factors of 15870

List of positive integer factors of 15870 that divides 15870 without a remainder.

1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 529, 690, 1058, 1587, 2645, 3174, 5290, 7935

Step-4: Factors of 15885

List of positive integer factors of 15885 that divides 15870 without a remainder.

1, 3, 5, 9, 15, 45, 353, 1059, 1765, 3177, 5295

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15870 and 15885. The biggest common factor number is the GCF number.
So the greatest common factor 15870 and 15885 is 15.

Also check out the Least Common Multiple of 15870 and 15885