What is the Greatest Common Factor of 81585 and 81600?

Greatest common factor (GCF) of 81585 and 81600 is 15.

GCF(81585,81600) = 15

We will now calculate the prime factors of 81585 and 81600, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81585 and 81600.

How to find the GCF of 81585 and 81600?

We will first find the prime factorization of 81585 and 81600. After we will calculate the factors of 81585 and 81600 and find the biggest common factor number .

Step-1: Prime Factorization of 81585

Prime factors of 81585 are 3, 5, 7, 37. Prime factorization of 81585 in exponential form is:

81585 = 3² × 5¹ × 7² × 37¹

Step-2: Prime Factorization of 81600

Prime factors of 81600 are 2, 3, 5, 17. Prime factorization of 81600 in exponential form is:

81600 = 2⁶ × 3¹ × 5² × 17¹

Step-3: Factors of 81585

List of positive integer factors of 81585 that divides 81585 without a remainder.

1, 3, 5, 7, 9, 15, 21, 35, 37, 45, 49, 63, 105, 111, 147, 185, 245, 259, 315, 333, 441, 555, 735, 777, 1295, 1665, 1813, 2205, 2331, 3885, 5439, 9065, 11655, 16317, 27195

Step-4: Factors of 81600

List of positive integer factors of 81600 that divides 81585 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 25, 30, 32, 34, 40, 48, 50, 51, 60, 64, 68, 75, 80, 85, 96, 100, 102, 120, 136, 150, 160, 170, 192, 200, 204, 240, 255, 272, 300, 320, 340, 400, 408, 425, 480, 510, 544, 600, 680, 800, 816, 850, 960, 1020, 1088, 1200, 1275, 1360, 1600, 1632, 1700, 2040, 2400, 2550, 2720, 3264, 3400, 4080, 4800, 5100, 5440, 6800, 8160, 10200, 13600, 16320, 20400, 27200, 40800

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81585 and 81600. The biggest common factor number is the GCF number.
So the greatest common factor 81585 and 81600 is 15.

Also check out the Least Common Multiple of 81585 and 81600