What is the Greatest Common Factor of 31665 and 31680?

Greatest common factor (GCF) of 31665 and 31680 is 15.

GCF(31665,31680) = 15

We will now calculate the prime factors of 31665 and 31680, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 31665 and 31680.

How to find the GCF of 31665 and 31680?

We will first find the prime factorization of 31665 and 31680. After we will calculate the factors of 31665 and 31680 and find the biggest common factor number .

Step-1: Prime Factorization of 31665

Prime factors of 31665 are 3, 5, 2111. Prime factorization of 31665 in exponential form is:

31665 = 3¹ × 5¹ × 2111¹

Step-2: Prime Factorization of 31680

Prime factors of 31680 are 2, 3, 5, 11. Prime factorization of 31680 in exponential form is:

31680 = 2⁶ × 3² × 5¹ × 11¹

Step-3: Factors of 31665

List of positive integer factors of 31665 that divides 31665 without a remainder.

1, 3, 5, 15, 2111, 6333, 10555

Step-4: Factors of 31680

List of positive integer factors of 31680 that divides 31665 without a remainder.

1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 32, 33, 36, 40, 44, 45, 48, 55, 60, 64, 66, 72, 80, 88, 90, 96, 99, 110, 120, 132, 144, 160, 165, 176, 180, 192, 198, 220, 240, 264, 288, 320, 330, 352, 360, 396, 440, 480, 495, 528, 576, 660, 704, 720, 792, 880, 960, 990, 1056, 1320, 1440, 1584, 1760, 1980, 2112, 2640, 2880, 3168, 3520, 3960, 5280, 6336, 7920, 10560, 15840

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 31665 and 31680. The biggest common factor number is the GCF number.
So the greatest common factor 31665 and 31680 is 15.

Also check out the Least Common Multiple of 31665 and 31680