What is the Greatest Common Factor of 42081 and 42090?

Greatest common factor (GCF) of 42081 and 42090 is 3.

GCF(42081,42090) = 3

We will now calculate the prime factors of 42081 and 42090, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42081 and 42090.

How to find the GCF of 42081 and 42090?

We will first find the prime factorization of 42081 and 42090. After we will calculate the factors of 42081 and 42090 and find the biggest common factor number .

Step-1: Prime Factorization of 42081

Prime factors of 42081 are 3, 13, 83. Prime factorization of 42081 in exponential form is:

42081 = 3¹ × 13² × 83¹

Step-2: Prime Factorization of 42090

Prime factors of 42090 are 2, 3, 5, 23, 61. Prime factorization of 42090 in exponential form is:

42090 = 2¹ × 3¹ × 5¹ × 23¹ × 61¹

Step-3: Factors of 42081

List of positive integer factors of 42081 that divides 42081 without a remainder.

1, 3, 13, 39, 83, 169, 249, 507, 1079, 3237, 14027

Step-4: Factors of 42090

List of positive integer factors of 42090 that divides 42081 without a remainder.

1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 61, 69, 115, 122, 138, 183, 230, 305, 345, 366, 610, 690, 915, 1403, 1830, 2806, 4209, 7015, 8418, 14030, 21045

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42081 and 42090. The biggest common factor number is the GCF number.
So the greatest common factor 42081 and 42090 is 3.

Also check out the Least Common Multiple of 42081 and 42090