Online GCD Calculator is useful to find the GCD of 628, 820, 665, 815 quickly. Get the easiest ways to solve the greatest common divisor of 628, 820, 665, 815 i.e 1 in different methods as follows.
Given Input numbers are 628, 820, 665, 815
In the factoring method, we have to find the divisors of all numbers
Divisors of 628 :
The positive integer divisors of 628 that completely divides 628 are.
1, 2, 4, 157, 314, 628
Divisors of 820 :
The positive integer divisors of 820 that completely divides 820 are.
1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820
Divisors of 665 :
The positive integer divisors of 665 that completely divides 665 are.
1, 5, 7, 19, 35, 95, 133, 665
Divisors of 815 :
The positive integer divisors of 815 that completely divides 815 are.
1, 5, 163, 815
GCD of numbers is the greatest common divisor
So, the GCD (628, 820, 665, 815) = 1.
Given numbers are 628, 820, 665, 815
The list of prime factors of all numbers are
Prime factors of 628 are 2 x 2 x 157
Prime factors of 820 are 2 x 2 x 5 x 41
Prime factors of 665 are 5 x 7 x 19
Prime factors of 815 are 5 x 163
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 628, 820, 665, 815
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(628, 820) = 128740
GCD(628, 820) = ( 628 x 820 ) / 128740
= 628 / 820
= 628
Step2:
LCM(4, 665) = 2660
GCD(4, 665) = ( 4 x 665 ) / 2660
= 4 / 665
= 4
Step3:
LCM(1, 815) = 815
GCD(1, 815) = ( 1 x 815 ) / 815
= 1 / 815
= 1
So, Greatest Common Divisor of 628, 820, 665, 815 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 628, 820, 665, 815
The greatest common divisor of numbers 628, 820, 665, 815 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 628, 820, 665, 815 is 1.
1. What is the GCD of 628, 820, 665, 815?
GCD of given numbers 628, 820, 665, 815 is 1
2. How to calculate the greatest common divisor of 628, 820, 665, 815?
We can find the highest common divisor of 628, 820, 665, 815 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 628, 820, 665, 815 i.e 1.
3. How can I use the GCD of 628, 820, 665, 815Calculator?
Out the numbers 628, 820, 665, 815 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.