Online GCD Calculator is useful to find the GCD of 815, 728, 138, 819 quickly. Get the easiest ways to solve the greatest common divisor of 815, 728, 138, 819 i.e 1 in different methods as follows.
Given Input numbers are 815, 728, 138, 819
In the factoring method, we have to find the divisors of all numbers
Divisors of 815 :
The positive integer divisors of 815 that completely divides 815 are.
1, 5, 163, 815
Divisors of 728 :
The positive integer divisors of 728 that completely divides 728 are.
1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728
Divisors of 138 :
The positive integer divisors of 138 that completely divides 138 are.
1, 2, 3, 6, 23, 46, 69, 138
Divisors of 819 :
The positive integer divisors of 819 that completely divides 819 are.
1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819
GCD of numbers is the greatest common divisor
So, the GCD (815, 728, 138, 819) = 1.
Given numbers are 815, 728, 138, 819
The list of prime factors of all numbers are
Prime factors of 815 are 5 x 163
Prime factors of 728 are 2 x 2 x 2 x 7 x 13
Prime factors of 138 are 2 x 3 x 23
Prime factors of 819 are 3 x 3 x 7 x 13
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 815, 728, 138, 819
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(815, 728) = 593320
GCD(815, 728) = ( 815 x 728 ) / 593320
= 815 / 728
= 815
Step2:
LCM(1, 138) = 138
GCD(1, 138) = ( 1 x 138 ) / 138
= 1 / 138
= 1
Step3:
LCM(1, 819) = 819
GCD(1, 819) = ( 1 x 819 ) / 819
= 1 / 819
= 1
So, Greatest Common Divisor of 815, 728, 138, 819 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 815, 728, 138, 819
The greatest common divisor of numbers 815, 728, 138, 819 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 815, 728, 138, 819 is 1.
1. What is the GCD of 815, 728, 138, 819?
GCD of given numbers 815, 728, 138, 819 is 1
2. How to calculate the greatest common divisor of 815, 728, 138, 819?
We can find the highest common divisor of 815, 728, 138, 819 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 815, 728, 138, 819 i.e 1.
3. How can I use the GCD of 815, 728, 138, 819Calculator?
Out the numbers 815, 728, 138, 819 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.