Online GCD Calculator is useful to find the GCD of 721, 978, 245, 165 quickly. Get the easiest ways to solve the greatest common divisor of 721, 978, 245, 165 i.e 1 in different methods as follows.
Given Input numbers are 721, 978, 245, 165
In the factoring method, we have to find the divisors of all numbers
Divisors of 721 :
The positive integer divisors of 721 that completely divides 721 are.
1, 7, 103, 721
Divisors of 978 :
The positive integer divisors of 978 that completely divides 978 are.
1, 2, 3, 6, 163, 326, 489, 978
Divisors of 245 :
The positive integer divisors of 245 that completely divides 245 are.
1, 5, 7, 35, 49, 245
Divisors of 165 :
The positive integer divisors of 165 that completely divides 165 are.
1, 3, 5, 11, 15, 33, 55, 165
GCD of numbers is the greatest common divisor
So, the GCD (721, 978, 245, 165) = 1.
Given numbers are 721, 978, 245, 165
The list of prime factors of all numbers are
Prime factors of 721 are 7 x 103
Prime factors of 978 are 2 x 3 x 163
Prime factors of 245 are 5 x 7 x 7
Prime factors of 165 are 3 x 5 x 11
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 721, 978, 245, 165
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(721, 978) = 705138
GCD(721, 978) = ( 721 x 978 ) / 705138
= 721 / 978
= 721
Step2:
LCM(1, 245) = 245
GCD(1, 245) = ( 1 x 245 ) / 245
= 1 / 245
= 1
Step3:
LCM(1, 165) = 165
GCD(1, 165) = ( 1 x 165 ) / 165
= 1 / 165
= 1
So, Greatest Common Divisor of 721, 978, 245, 165 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 721, 978, 245, 165
The greatest common divisor of numbers 721, 978, 245, 165 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 721, 978, 245, 165 is 1.
1. What is the GCD of 721, 978, 245, 165?
GCD of given numbers 721, 978, 245, 165 is 1
2. How to calculate the greatest common divisor of 721, 978, 245, 165?
We can find the highest common divisor of 721, 978, 245, 165 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 721, 978, 245, 165 i.e 1.
3. How can I use the GCD of 721, 978, 245, 165Calculator?
Out the numbers 721, 978, 245, 165 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.