What is the Greatest Common Factor of 85420 and 85440?

Greatest common factor (GCF) of 85420 and 85440 is 20.

GCF(85420,85440) = 20

We will now calculate the prime factors of 85420 and 85440, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 85420 and 85440.

How to find the GCF of 85420 and 85440?

We will first find the prime factorization of 85420 and 85440. After we will calculate the factors of 85420 and 85440 and find the biggest common factor number .

Step-1: Prime Factorization of 85420

Prime factors of 85420 are 2, 5, 4271. Prime factorization of 85420 in exponential form is:

85420 = 2² × 5¹ × 4271¹

Step-2: Prime Factorization of 85440

Prime factors of 85440 are 2, 3, 5, 89. Prime factorization of 85440 in exponential form is:

85440 = 2⁶ × 3¹ × 5¹ × 89¹

Step-3: Factors of 85420

List of positive integer factors of 85420 that divides 85420 without a remainder.

1, 2, 4, 5, 10, 20, 4271, 8542, 17084, 21355, 42710

Step-4: Factors of 85440

List of positive integer factors of 85440 that divides 85420 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 89, 96, 120, 160, 178, 192, 240, 267, 320, 356, 445, 480, 534, 712, 890, 960, 1068, 1335, 1424, 1780, 2136, 2670, 2848, 3560, 4272, 5340, 5696, 7120, 8544, 10680, 14240, 17088, 21360, 28480, 42720

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 85420 and 85440. The biggest common factor number is the GCF number.
So the greatest common factor 85420 and 85440 is 20.

Also check out the Least Common Multiple of 85420 and 85440