What is the Greatest Common Factor of 67420 and 67440?

Greatest common factor (GCF) of 67420 and 67440 is 20.

GCF(67420,67440) = 20

We will now calculate the prime factors of 67420 and 67440, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 67420 and 67440.

How to find the GCF of 67420 and 67440?

We will first find the prime factorization of 67420 and 67440. After we will calculate the factors of 67420 and 67440 and find the biggest common factor number .

Step-1: Prime Factorization of 67420

Prime factors of 67420 are 2, 5, 3371. Prime factorization of 67420 in exponential form is:

67420 = 2² × 5¹ × 3371¹

Step-2: Prime Factorization of 67440

Prime factors of 67440 are 2, 3, 5, 281. Prime factorization of 67440 in exponential form is:

67440 = 2⁴ × 3¹ × 5¹ × 281¹

Step-3: Factors of 67420

List of positive integer factors of 67420 that divides 67420 without a remainder.

1, 2, 4, 5, 10, 20, 3371, 6742, 13484, 16855, 33710

Step-4: Factors of 67440

List of positive integer factors of 67440 that divides 67420 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 281, 562, 843, 1124, 1405, 1686, 2248, 2810, 3372, 4215, 4496, 5620, 6744, 8430, 11240, 13488, 16860, 22480, 33720

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 67420 and 67440. The biggest common factor number is the GCF number.
So the greatest common factor 67420 and 67440 is 20.

Also check out the Least Common Multiple of 67420 and 67440