Online GCD Calculator is useful to find the GCD of 689, 781, 120, 715 quickly. Get the easiest ways to solve the greatest common divisor of 689, 781, 120, 715 i.e 1 in different methods as follows.
Given Input numbers are 689, 781, 120, 715
In the factoring method, we have to find the divisors of all numbers
Divisors of 689 :
The positive integer divisors of 689 that completely divides 689 are.
1, 13, 53, 689
Divisors of 781 :
The positive integer divisors of 781 that completely divides 781 are.
1, 11, 71, 781
Divisors of 120 :
The positive integer divisors of 120 that completely divides 120 are.
1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
Divisors of 715 :
The positive integer divisors of 715 that completely divides 715 are.
1, 5, 11, 13, 55, 65, 143, 715
GCD of numbers is the greatest common divisor
So, the GCD (689, 781, 120, 715) = 1.
Given numbers are 689, 781, 120, 715
The list of prime factors of all numbers are
Prime factors of 689 are 13 x 53
Prime factors of 781 are 11 x 71
Prime factors of 120 are 2 x 2 x 2 x 3 x 5
Prime factors of 715 are 5 x 11 x 13
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 689, 781, 120, 715
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(689, 781) = 538109
GCD(689, 781) = ( 689 x 781 ) / 538109
= 689 / 781
= 689
Step2:
LCM(1, 120) = 120
GCD(1, 120) = ( 1 x 120 ) / 120
= 1 / 120
= 1
Step3:
LCM(1, 715) = 715
GCD(1, 715) = ( 1 x 715 ) / 715
= 1 / 715
= 1
So, Greatest Common Divisor of 689, 781, 120, 715 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 689, 781, 120, 715
The greatest common divisor of numbers 689, 781, 120, 715 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 689, 781, 120, 715 is 1.
1. What is the GCD of 689, 781, 120, 715?
GCD of given numbers 689, 781, 120, 715 is 1
2. How to calculate the greatest common divisor of 689, 781, 120, 715?
We can find the highest common divisor of 689, 781, 120, 715 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 689, 781, 120, 715 i.e 1.
3. How can I use the GCD of 689, 781, 120, 715Calculator?
Out the numbers 689, 781, 120, 715 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.