What is the Greatest Common Factor of 64620 and 64638?

Greatest common factor (GCF) of 64620 and 64638 is 18.

GCF(64620,64638) = 18

We will now calculate the prime factors of 64620 and 64638, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 64620 and 64638.

How to find the GCF of 64620 and 64638?

We will first find the prime factorization of 64620 and 64638. After we will calculate the factors of 64620 and 64638 and find the biggest common factor number .

Step-1: Prime Factorization of 64620

Prime factors of 64620 are 2, 3, 5, 359. Prime factorization of 64620 in exponential form is:

64620 = 2² × 3² × 5¹ × 359¹

Step-2: Prime Factorization of 64638

Prime factors of 64638 are 2, 3, 7, 19. Prime factorization of 64638 in exponential form is:

64638 = 2¹ × 3⁵ × 7¹ × 19¹

Step-3: Factors of 64620

List of positive integer factors of 64620 that divides 64620 without a remainder.

1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 359, 718, 1077, 1436, 1795, 2154, 3231, 3590, 4308, 5385, 6462, 7180, 10770, 12924, 16155, 21540, 32310

Step-4: Factors of 64638

List of positive integer factors of 64638 that divides 64620 without a remainder.

1, 2, 3, 6, 7, 9, 14, 18, 19, 21, 27, 38, 42, 54, 57, 63, 81, 114, 126, 133, 162, 171, 189, 243, 266, 342, 378, 399, 486, 513, 567, 798, 1026, 1134, 1197, 1539, 1701, 2394, 3078, 3402, 3591, 4617, 7182, 9234, 10773, 21546, 32319

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 64620 and 64638. The biggest common factor number is the GCF number.
So the greatest common factor 64620 and 64638 is 18.

Also check out the Least Common Multiple of 64620 and 64638