What is the Greatest Common Factor of 72090 and 72105?

Greatest common factor (GCF) of 72090 and 72105 is 15.

GCF(72090,72105) = 15

We will now calculate the prime factors of 72090 and 72105, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 72090 and 72105.

How to find the GCF of 72090 and 72105?

We will first find the prime factorization of 72090 and 72105. After we will calculate the factors of 72090 and 72105 and find the biggest common factor number .

Step-1: Prime Factorization of 72090

Prime factors of 72090 are 2, 3, 5, 89. Prime factorization of 72090 in exponential form is:

72090 = 2¹ × 3⁴ × 5¹ × 89¹

Step-2: Prime Factorization of 72105

Prime factors of 72105 are 3, 5, 11, 19, 23. Prime factorization of 72105 in exponential form is:

72105 = 3¹ × 5¹ × 11¹ × 19¹ × 23¹

Step-3: Factors of 72090

List of positive integer factors of 72090 that divides 72090 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 89, 90, 135, 162, 178, 267, 270, 405, 445, 534, 801, 810, 890, 1335, 1602, 2403, 2670, 4005, 4806, 7209, 8010, 12015, 14418, 24030, 36045

Step-4: Factors of 72105

List of positive integer factors of 72105 that divides 72090 without a remainder.

1, 3, 5, 11, 15, 19, 23, 33, 55, 57, 69, 95, 115, 165, 209, 253, 285, 345, 437, 627, 759, 1045, 1265, 1311, 2185, 3135, 3795, 4807, 6555, 14421, 24035

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 72090 and 72105. The biggest common factor number is the GCF number.
So the greatest common factor 72090 and 72105 is 15.

Also check out the Least Common Multiple of 72090 and 72105