What is the Greatest Common Factor of 40290 and 40305?

Greatest common factor (GCF) of 40290 and 40305 is 15.

GCF(40290,40305) = 15

We will now calculate the prime factors of 40290 and 40305, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 40290 and 40305.

How to find the GCF of 40290 and 40305?

We will first find the prime factorization of 40290 and 40305. After we will calculate the factors of 40290 and 40305 and find the biggest common factor number .

Step-1: Prime Factorization of 40290

Prime factors of 40290 are 2, 3, 5, 17, 79. Prime factorization of 40290 in exponential form is:

40290 = 2¹ × 3¹ × 5¹ × 17¹ × 79¹

Step-2: Prime Factorization of 40305

Prime factors of 40305 are 3, 5, 2687. Prime factorization of 40305 in exponential form is:

40305 = 3¹ × 5¹ × 2687¹

Step-3: Factors of 40290

List of positive integer factors of 40290 that divides 40290 without a remainder.

1, 2, 3, 5, 6, 10, 15, 17, 30, 34, 51, 79, 85, 102, 158, 170, 237, 255, 395, 474, 510, 790, 1185, 1343, 2370, 2686, 4029, 6715, 8058, 13430, 20145

Step-4: Factors of 40305

List of positive integer factors of 40305 that divides 40290 without a remainder.

1, 3, 5, 15, 2687, 8061, 13435

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 40290 and 40305. The biggest common factor number is the GCF number.
So the greatest common factor 40290 and 40305 is 15.

Also check out the Least Common Multiple of 40290 and 40305