What is the Greatest Common Factor of 81580 and 81600?

Greatest common factor (GCF) of 81580 and 81600 is 20.

GCF(81580,81600) = 20

We will now calculate the prime factors of 81580 and 81600, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81580 and 81600.

How to find the GCF of 81580 and 81600?

We will first find the prime factorization of 81580 and 81600. After we will calculate the factors of 81580 and 81600 and find the biggest common factor number .

Step-1: Prime Factorization of 81580

Prime factors of 81580 are 2, 5, 4079. Prime factorization of 81580 in exponential form is:

81580 = 2² × 5¹ × 4079¹

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 81580

List of positive integer factors of 81580 that divides 81580 without a remainder.

1, 2, 4, 5, 10, 20, 4079, 8158, 16316, 20395, 40790

Step-4: Factors of 81600

List of positive integer factors of 81600 that divides 81580 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 81580 and 81600. The biggest common factor number is the GCF number.
So the greatest common factor 81580 and 81600 is 20.

Also check out the Least Common Multiple of 81580 and 81600