What is the Greatest Common Factor of 20920 and 20930?

Greatest common factor (GCF) of 20920 and 20930 is 10.

GCF(20920,20930) = 10

We will now calculate the prime factors of 20920 and 20930, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20920 and 20930.

How to find the GCF of 20920 and 20930?

We will first find the prime factorization of 20920 and 20930. After we will calculate the factors of 20920 and 20930 and find the biggest common factor number .

Step-1: Prime Factorization of 20920

Prime factors of 20920 are 2, 5, 523. Prime factorization of 20920 in exponential form is:

20920 = 2³ × 5¹ × 523¹

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 20920

List of positive integer factors of 20920 that divides 20920 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 523, 1046, 2092, 2615, 4184, 5230, 10460

Step-4: Factors of 20930

List of positive integer factors of 20930 that divides 20920 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 20920 and 20930. The biggest common factor number is the GCF number.
So the greatest common factor 20920 and 20930 is 10.

Also check out the Least Common Multiple of 20920 and 20930