Online GCD Calculator is useful to find the GCD of 690, 309, 689 quickly. Get the easiest ways to solve the greatest common divisor of 690, 309, 689 i.e 1 in different methods as follows.
Given Input numbers are 690, 309, 689
In the factoring method, we have to find the divisors of all numbers
Divisors of 690 :
The positive integer divisors of 690 that completely divides 690 are.
1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
Divisors of 309 :
The positive integer divisors of 309 that completely divides 309 are.
1, 3, 103, 309
Divisors of 689 :
The positive integer divisors of 689 that completely divides 689 are.
1, 13, 53, 689
GCD of numbers is the greatest common divisor
So, the GCD (690, 309, 689) = 1.
Given numbers are 690, 309, 689
The list of prime factors of all numbers are
Prime factors of 690 are 2 x 3 x 5 x 23
Prime factors of 309 are 3 x 103
Prime factors of 689 are 13 x 53
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 690, 309, 689
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(690, 309) = 71070
GCD(690, 309) = ( 690 x 309 ) / 71070
= 690 / 309
= 690
Step2:
LCM(3, 689) = 2067
GCD(3, 689) = ( 3 x 689 ) / 2067
= 3 / 689
= 3
So, Greatest Common Divisor of 690, 309, 689 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 690, 309, 689
The greatest common divisor of numbers 690, 309, 689 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 690, 309, 689 is 1.
1. What is the GCD of 690, 309, 689?
GCD of given numbers 690, 309, 689 is 1
2. How to calculate the greatest common divisor of 690, 309, 689?
We can find the highest common divisor of 690, 309, 689 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 690, 309, 689 i.e 1.
3. How can I use the GCD of 690, 309, 689Calculator?
Out the numbers 690, 309, 689 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.