What is the Greatest Common Factor of 15820 and 15840?

Greatest common factor (GCF) of 15820 and 15840 is 20.

GCF(15820,15840) = 20

We will now calculate the prime factors of 15820 and 15840, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15820 and 15840.

How to find the GCF of 15820 and 15840?

We will first find the prime factorization of 15820 and 15840. After we will calculate the factors of 15820 and 15840 and find the biggest common factor number .

Step-1: Prime Factorization of 15820

Prime factors of 15820 are 2, 5, 7, 113. Prime factorization of 15820 in exponential form is:

15820 = 2² × 5¹ × 7¹ × 113¹

Step-2: Prime Factorization of 15840

Prime factors of 15840 are 2, 3, 5, 11. Prime factorization of 15840 in exponential form is:

15840 = 2⁵ × 3² × 5¹ × 11¹

Step-3: Factors of 15820

List of positive integer factors of 15820 that divides 15820 without a remainder.

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 113, 140, 226, 452, 565, 791, 1130, 1582, 2260, 3164, 3955, 7910

Step-4: Factors of 15840

List of positive integer factors of 15840 that divides 15820 without a remainder.

1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 32, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 96, 99, 110, 120, 132, 144, 160, 165, 176, 180, 198, 220, 240, 264, 288, 330, 352, 360, 396, 440, 480, 495, 528, 660, 720, 792, 880, 990, 1056, 1320, 1440, 1584, 1760, 1980, 2640, 3168, 3960, 5280, 7920

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15820 and 15840. The biggest common factor number is the GCF number.
So the greatest common factor 15820 and 15840 is 20.

Also check out the Least Common Multiple of 15820 and 15840