What is the Greatest Common Factor of 72400 and 72405?

Greatest common factor (GCF) of 72400 and 72405 is 5.

GCF(72400,72405) = 5

We will now calculate the prime factors of 72400 and 72405, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 72400 and 72405.

How to find the GCF of 72400 and 72405?

We will first find the prime factorization of 72400 and 72405. After we will calculate the factors of 72400 and 72405 and find the biggest common factor number .

Step-1: Prime Factorization of 72400

Prime factors of 72400 are 2, 5, 181. Prime factorization of 72400 in exponential form is:

72400 = 2⁴ × 5² × 181¹

Step-2: Prime Factorization of 72405

Prime factors of 72405 are 3, 5, 1609. Prime factorization of 72405 in exponential form is:

72405 = 3² × 5¹ × 1609¹

Step-3: Factors of 72400

List of positive integer factors of 72400 that divides 72400 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 181, 200, 362, 400, 724, 905, 1448, 1810, 2896, 3620, 4525, 7240, 9050, 14480, 18100, 36200

Step-4: Factors of 72405

List of positive integer factors of 72405 that divides 72400 without a remainder.

1, 3, 5, 9, 15, 45, 1609, 4827, 8045, 14481, 24135

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 72400 and 72405. The biggest common factor number is the GCF number.
So the greatest common factor 72400 and 72405 is 5.

Also check out the Least Common Multiple of 72400 and 72405