What is the Greatest Common Factor of 65420 and 65440?

Greatest common factor (GCF) of 65420 and 65440 is 20.

GCF(65420,65440) = 20

We will now calculate the prime factors of 65420 and 65440, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 65420 and 65440.

How to find the GCF of 65420 and 65440?

We will first find the prime factorization of 65420 and 65440. After we will calculate the factors of 65420 and 65440 and find the biggest common factor number .

Step-1: Prime Factorization of 65420

Prime factors of 65420 are 2, 5, 3271. Prime factorization of 65420 in exponential form is:

65420 = 2² × 5¹ × 3271¹

Step-2: Prime Factorization of 65440

Prime factors of 65440 are 2, 5, 409. Prime factorization of 65440 in exponential form is:

65440 = 2⁵ × 5¹ × 409¹

Step-3: Factors of 65420

List of positive integer factors of 65420 that divides 65420 without a remainder.

1, 2, 4, 5, 10, 20, 3271, 6542, 13084, 16355, 32710

Step-4: Factors of 65440

List of positive integer factors of 65440 that divides 65420 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 409, 818, 1636, 2045, 3272, 4090, 6544, 8180, 13088, 16360, 32720

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 65420 and 65440. The biggest common factor number is the GCF number.
So the greatest common factor 65420 and 65440 is 20.

Also check out the Least Common Multiple of 65420 and 65440