Online GCD Calculator is useful to find the GCD of 656, 720, 646, 638 quickly. Get the easiest ways to solve the greatest common divisor of 656, 720, 646, 638 i.e 2 in different methods as follows.
Given Input numbers are 656, 720, 646, 638
In the factoring method, we have to find the divisors of all numbers
Divisors of 656 :
The positive integer divisors of 656 that completely divides 656 are.
1, 2, 4, 8, 16, 41, 82, 164, 328, 656
Divisors of 720 :
The positive integer divisors of 720 that completely divides 720 are.
1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
Divisors of 646 :
The positive integer divisors of 646 that completely divides 646 are.
1, 2, 17, 19, 34, 38, 323, 646
Divisors of 638 :
The positive integer divisors of 638 that completely divides 638 are.
1, 2, 11, 22, 29, 58, 319, 638
GCD of numbers is the greatest common divisor
So, the GCD (656, 720, 646, 638) = 2.
Given numbers are 656, 720, 646, 638
The list of prime factors of all numbers are
Prime factors of 656 are 2 x 2 x 2 x 2 x 41
Prime factors of 720 are 2 x 2 x 2 x 2 x 3 x 3 x 5
Prime factors of 646 are 2 x 17 x 19
Prime factors of 638 are 2 x 11 x 29
The highest common occurrence is 21
Therefore, GCD of 656, 720, 646, 638 is 2.
Given numbers are 656, 720, 646, 638
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(656, 720) = 29520
GCD(656, 720) = ( 656 x 720 ) / 29520
= 656 / 720
= 656
Step2:
LCM(16, 646) = 5168
GCD(16, 646) = ( 16 x 646 ) / 5168
= 16 / 646
= 16
Step3:
LCM(2, 638) = 638
GCD(2, 638) = ( 2 x 638 ) / 638
= 2 / 638
= 2
So, Greatest Common Divisor of 656, 720, 646, 638 is 2
Here are some samples of GCD of Numbers calculations.
Given numbers are 656, 720, 646, 638
The greatest common divisor of numbers 656, 720, 646, 638 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 656, 720, 646, 638 is 2.
1. What is the GCD of 656, 720, 646, 638?
GCD of given numbers 656, 720, 646, 638 is 2
2. How to calculate the greatest common divisor of 656, 720, 646, 638?
We can find the highest common divisor of 656, 720, 646, 638 easily using the prime factorization method. Just list the prime factors of all numbers and pick the highest common factor which is the GCD of 656, 720, 646, 638 i.e 2.
3. How can I use the GCD of 656, 720, 646, 638Calculator?
Out the numbers 656, 720, 646, 638 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.