GCD of 821, 649, 818, 390 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 821, 649, 818, 390 quickly. Get the easiest ways to solve the greatest common divisor of 821, 649, 818, 390 i.e 1 in different methods as follows.
Given Input numbers are 821, 649, 818, 390
In the factoring method, we have to find the divisors of all numbers
Divisors of 821 :
The positive integer divisors of 821 that completely divides 821 are.
1, 821
Divisors of 649 :
The positive integer divisors of 649 that completely divides 649 are.
1, 11, 59, 649
Divisors of 818 :
The positive integer divisors of 818 that completely divides 818 are.
1, 2, 409, 818
Divisors of 390 :
The positive integer divisors of 390 that completely divides 390 are.
1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
GCD of numbers is the greatest common divisor
So, the GCD (821, 649, 818, 390) = 1.
Given numbers are 821, 649, 818, 390
The list of prime factors of all numbers are
Prime factors of 821 are 821
Prime factors of 649 are 11 x 59
Prime factors of 818 are 2 x 409
Prime factors of 390 are 2 x 3 x 5 x 13
The above numbers do not have any common prime factor. So GCD is 1
Steps to Calculate GCD of 821, 649, 818, 390 using LCM Formula
Given numbers are 821, 649, 818, 390
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(821, 649) = 532829
GCD(821, 649) = ( 821 x 649 ) / 532829
= 821 / 649
= 821
Step2:
LCM(1, 818) = 818
GCD(1, 818) = ( 1 x 818 ) / 818
= 1 / 818
= 1
Step3:
LCM(1, 390) = 390
GCD(1, 390) = ( 1 x 390 ) / 390
= 1 / 390
= 1
So, Greatest Common Divisor of 821, 649, 818, 390 is 1
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 821, 649, 818, 390
Given numbers are 821, 649, 818, 390
The greatest common divisor of numbers 821, 649, 818, 390 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 821, 649, 818, 390 is 1.
FAQs on GCD of 821, 649, 818, 390 Calculator
1. What is the GCD of 821, 649, 818, 390?
GCD of given numbers 821, 649, 818, 390 is 1
2. How to calculate the greatest common divisor of 821, 649, 818, 390?
We can find the highest common divisor of 821, 649, 818, 390 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 821, 649, 818, 390 i.e 1.
3. How can I use the GCD of 821, 649, 818, 390Calculator?
Out the numbers 821, 649, 818, 390 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.