What is the Greatest Common Factor of 25840 and 25857?

Greatest common factor (GCF) of 25840 and 25857 is 17.

GCF(25840,25857) = 17

We will now calculate the prime factors of 25840 and 25857, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25840 and 25857.

How to find the GCF of 25840 and 25857?

We will first find the prime factorization of 25840 and 25857. After we will calculate the factors of 25840 and 25857 and find the biggest common factor number .

Step-1: Prime Factorization of 25840

Prime factors of 25840 are 2, 5, 17, 19. Prime factorization of 25840 in exponential form is:

25840 = 2⁴ × 5¹ × 17¹ × 19¹

Step-2: Prime Factorization of 25857

Prime factors of 25857 are 3, 13, 17. Prime factorization of 25857 in exponential form is:

25857 = 3² × 13² × 17¹

Step-3: Factors of 25840

List of positive integer factors of 25840 that divides 25840 without a remainder.

1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 34, 38, 40, 68, 76, 80, 85, 95, 136, 152, 170, 190, 272, 304, 323, 340, 380, 646, 680, 760, 1292, 1360, 1520, 1615, 2584, 3230, 5168, 6460, 12920

Step-4: Factors of 25857

List of positive integer factors of 25857 that divides 25840 without a remainder.

1, 3, 9, 13, 17, 39, 51, 117, 153, 169, 221, 507, 663, 1521, 1989, 2873, 8619

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25840 and 25857. The biggest common factor number is the GCF number.
So the greatest common factor 25840 and 25857 is 17.

Also check out the Least Common Multiple of 25840 and 25857