Online GCD Calculator is useful to find the GCD of 691, 665, 645 quickly. Get the easiest ways to solve the greatest common divisor of 691, 665, 645 i.e 1 in different methods as follows.
Given Input numbers are 691, 665, 645
In the factoring method, we have to find the divisors of all numbers
Divisors of 691 :
The positive integer divisors of 691 that completely divides 691 are.
1, 691
Divisors of 665 :
The positive integer divisors of 665 that completely divides 665 are.
1, 5, 7, 19, 35, 95, 133, 665
Divisors of 645 :
The positive integer divisors of 645 that completely divides 645 are.
1, 3, 5, 15, 43, 129, 215, 645
GCD of numbers is the greatest common divisor
So, the GCD (691, 665, 645) = 1.
Given numbers are 691, 665, 645
The list of prime factors of all numbers are
Prime factors of 691 are 691
Prime factors of 665 are 5 x 7 x 19
Prime factors of 645 are 3 x 5 x 43
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 691, 665, 645
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(691, 665) = 459515
GCD(691, 665) = ( 691 x 665 ) / 459515
= 691 / 665
= 691
Step2:
LCM(1, 645) = 645
GCD(1, 645) = ( 1 x 645 ) / 645
= 1 / 645
= 1
So, Greatest Common Divisor of 691, 665, 645 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 691, 665, 645
The greatest common divisor of numbers 691, 665, 645 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 691, 665, 645 is 1.
1. What is the GCD of 691, 665, 645?
GCD of given numbers 691, 665, 645 is 1
2. How to calculate the greatest common divisor of 691, 665, 645?
We can find the highest common divisor of 691, 665, 645 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 691, 665, 645 i.e 1.
3. How can I use the GCD of 691, 665, 645Calculator?
Out the numbers 691, 665, 645 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.