What is the Greatest Common Factor of 66240 and 66255?

Greatest common factor (GCF) of 66240 and 66255 is 15.

GCF(66240,66255) = 15

We will now calculate the prime factors of 66240 and 66255, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66240 and 66255.

How to find the GCF of 66240 and 66255?

We will first find the prime factorization of 66240 and 66255. After we will calculate the factors of 66240 and 66255 and find the biggest common factor number .

Step-1: Prime Factorization of 66240

Prime factors of 66240 are 2, 3, 5, 23. Prime factorization of 66240 in exponential form is:

66240 = 2⁶ × 3² × 5¹ × 23¹

Step-2: Prime Factorization of 66255

Prime factors of 66255 are 3, 5, 7, 631. Prime factorization of 66255 in exponential form is:

66255 = 3¹ × 5¹ × 7¹ × 631¹

Step-3: Factors of 66240

List of positive integer factors of 66240 that divides 66240 without a remainder.

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 32, 36, 40, 45, 46, 48, 60, 64, 69, 72, 80, 90, 92, 96, 115, 120, 138, 144, 160, 180, 184, 192, 207, 230, 240, 276, 288, 320, 345, 360, 368, 414, 460, 480, 552, 576, 690, 720, 736, 828, 920, 960, 1035, 1104, 1380, 1440, 1472, 1656, 1840, 2070, 2208, 2760, 2880, 3312, 3680, 4140, 4416, 5520, 6624, 7360, 8280, 11040, 13248, 16560, 22080, 33120

Step-4: Factors of 66255

List of positive integer factors of 66255 that divides 66240 without a remainder.

1, 3, 5, 7, 15, 21, 35, 105, 631, 1893, 3155, 4417, 9465, 13251, 22085

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66240 and 66255. The biggest common factor number is the GCF number.
So the greatest common factor 66240 and 66255 is 15.

Also check out the Least Common Multiple of 66240 and 66255