What is the Greatest Common Factor of 25840 and 25855?

Greatest common factor (GCF) of 25840 and 25855 is 5.

GCF(25840,25855) = 5

We will now calculate the prime factors of 25840 and 25855, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25840 and 25855.

How to find the GCF of 25840 and 25855?

We will first find the prime factorization of 25840 and 25855. After we will calculate the factors of 25840 and 25855 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 25855

Prime factors of 25855 are 5, 5171. Prime factorization of 25855 in exponential form is:

25855 = 5¹ × 5171¹

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 25855

List of positive integer factors of 25855 that divides 25840 without a remainder.

1, 5, 5171

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25840 and 25855. The biggest common factor number is the GCF number.
So the greatest common factor 25840 and 25855 is 5.

Also check out the Least Common Multiple of 25840 and 25855