What is the Greatest Common Factor of 13820 and 13840?

Greatest common factor (GCF) of 13820 and 13840 is 20.

GCF(13820,13840) = 20

We will now calculate the prime factors of 13820 and 13840, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 13820 and 13840.

How to find the GCF of 13820 and 13840?

We will first find the prime factorization of 13820 and 13840. After we will calculate the factors of 13820 and 13840 and find the biggest common factor number .

Step-1: Prime Factorization of 13820

Prime factors of 13820 are 2, 5, 691. Prime factorization of 13820 in exponential form is:

13820 = 2² × 5¹ × 691¹

Step-2: Prime Factorization of 13840

Prime factors of 13840 are 2, 5, 173. Prime factorization of 13840 in exponential form is:

13840 = 2⁴ × 5¹ × 173¹

Step-3: Factors of 13820

List of positive integer factors of 13820 that divides 13820 without a remainder.

1, 2, 4, 5, 10, 20, 691, 1382, 2764, 3455, 6910

Step-4: Factors of 13840

List of positive integer factors of 13840 that divides 13820 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 173, 346, 692, 865, 1384, 1730, 2768, 3460, 6920

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 13820 and 13840. The biggest common factor number is the GCF number.
So the greatest common factor 13820 and 13840 is 20.

Also check out the Least Common Multiple of 13820 and 13840