What is the Greatest Common Factor of 25890 and 25905?

Greatest common factor (GCF) of 25890 and 25905 is 15.

GCF(25890,25905) = 15

We will now calculate the prime factors of 25890 and 25905, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25890 and 25905.

How to find the GCF of 25890 and 25905?

We will first find the prime factorization of 25890 and 25905. After we will calculate the factors of 25890 and 25905 and find the biggest common factor number .

Step-1: Prime Factorization of 25890

Prime factors of 25890 are 2, 3, 5, 863. Prime factorization of 25890 in exponential form is:

25890 = 2¹ × 3¹ × 5¹ × 863¹

Step-2: Prime Factorization of 25905

Prime factors of 25905 are 3, 5, 11, 157. Prime factorization of 25905 in exponential form is:

25905 = 3¹ × 5¹ × 11¹ × 157¹

Step-3: Factors of 25890

List of positive integer factors of 25890 that divides 25890 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 863, 1726, 2589, 4315, 5178, 8630, 12945

Step-4: Factors of 25905

List of positive integer factors of 25905 that divides 25890 without a remainder.

1, 3, 5, 11, 15, 33, 55, 157, 165, 471, 785, 1727, 2355, 5181, 8635

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25890 and 25905. The biggest common factor number is the GCF number.
So the greatest common factor 25890 and 25905 is 15.

Also check out the Least Common Multiple of 25890 and 25905