What is the Greatest Common Factor of 20911 and 20930?

Greatest common factor (GCF) of 20911 and 20930 is 1.

GCF(20911,20930) = 1

We will now calculate the prime factors of 20911 and 20930, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20911 and 20930.

How to find the GCF of 20911 and 20930?

We will first find the prime factorization of 20911 and 20930. After we will calculate the factors of 20911 and 20930 and find the biggest common factor number .

Step-1: Prime Factorization of 20911

Prime factors of 20911 are 11, 1901. Prime factorization of 20911 in exponential form is:

20911 = 11¹ × 1901¹

Step-2: Prime Factorization of 20930

Prime factors of 20930 are 2, 5, 7, 13, 23. Prime factorization of 20930 in exponential form is:

20930 = 2¹ × 5¹ × 7¹ × 13¹ × 23¹

Step-3: Factors of 20911

List of positive integer factors of 20911 that divides 20911 without a remainder.

1, 11, 1901

Step-4: Factors of 20930

List of positive integer factors of 20930 that divides 20911 without a remainder.

1, 2, 5, 7, 10, 13, 14, 23, 26, 35, 46, 65, 70, 91, 115, 130, 161, 182, 230, 299, 322, 455, 598, 805, 910, 1495, 1610, 2093, 2990, 4186, 10465

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20911 and 20930. The biggest common factor number is the GCF number.
So the greatest common factor 20911 and 20930 is 1.

Also check out the Least Common Multiple of 20911 and 20930