What is the Greatest Common Factor of 20640 and 20650?

Greatest common factor (GCF) of 20640 and 20650 is 10.

GCF(20640,20650) = 10

We will now calculate the prime factors of 20640 and 20650, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20640 and 20650.

How to find the GCF of 20640 and 20650?

We will first find the prime factorization of 20640 and 20650. After we will calculate the factors of 20640 and 20650 and find the biggest common factor number .

Step-1: Prime Factorization of 20640

Prime factors of 20640 are 2, 3, 5, 43. Prime factorization of 20640 in exponential form is:

20640 = 2⁵ × 3¹ × 5¹ × 43¹

Step-2: Prime Factorization of 20650

Prime factors of 20650 are 2, 5, 7, 59. Prime factorization of 20650 in exponential form is:

20650 = 2¹ × 5² × 7¹ × 59¹

Step-3: Factors of 20640

List of positive integer factors of 20640 that divides 20640 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 43, 48, 60, 80, 86, 96, 120, 129, 160, 172, 215, 240, 258, 344, 430, 480, 516, 645, 688, 860, 1032, 1290, 1376, 1720, 2064, 2580, 3440, 4128, 5160, 6880, 10320

Step-4: Factors of 20650

List of positive integer factors of 20650 that divides 20640 without a remainder.

1, 2, 5, 7, 10, 14, 25, 35, 50, 59, 70, 118, 175, 295, 350, 413, 590, 826, 1475, 2065, 2950, 4130, 10325

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20640 and 20650. The biggest common factor number is the GCF number.
So the greatest common factor 20640 and 20650 is 10.

Also check out the Least Common Multiple of 20640 and 20650