What is the Greatest Common Factor of 72390 and 72409?

Greatest common factor (GCF) of 72390 and 72409 is 19.

GCF(72390,72409) = 19

We will now calculate the prime factors of 72390 and 72409, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 72390 and 72409.

How to find the GCF of 72390 and 72409?

We will first find the prime factorization of 72390 and 72409. After we will calculate the factors of 72390 and 72409 and find the biggest common factor number .

Step-1: Prime Factorization of 72390

Prime factors of 72390 are 2, 3, 5, 19, 127. Prime factorization of 72390 in exponential form is:

72390 = 2¹ × 3¹ × 5¹ × 19¹ × 127¹

Step-2: Prime Factorization of 72409

Prime factors of 72409 are 19, 37, 103. Prime factorization of 72409 in exponential form is:

72409 = 19¹ × 37¹ × 103¹

Step-3: Factors of 72390

List of positive integer factors of 72390 that divides 72390 without a remainder.

1, 2, 3, 5, 6, 10, 15, 19, 30, 38, 57, 95, 114, 127, 190, 254, 285, 381, 570, 635, 762, 1270, 1905, 2413, 3810, 4826, 7239, 12065, 14478, 24130, 36195

Step-4: Factors of 72409

List of positive integer factors of 72409 that divides 72390 without a remainder.

1, 19, 37, 103, 703, 1957, 3811

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 72390 and 72409. The biggest common factor number is the GCF number.
So the greatest common factor 72390 and 72409 is 19.

Also check out the Least Common Multiple of 72390 and 72409