GCD of 402, 780, 638 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 402, 780, 638 quickly. Get the easiest ways to solve the greatest common divisor of 402, 780, 638 i.e 2 in different methods as follows.
Given Input numbers are 402, 780, 638
In the factoring method, we have to find the divisors of all numbers
Divisors of 402 :
The positive integer divisors of 402 that completely divides 402 are.
1, 2, 3, 6, 67, 134, 201, 402
Divisors of 780 :
The positive integer divisors of 780 that completely divides 780 are.
1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
Divisors of 638 :
The positive integer divisors of 638 that completely divides 638 are.
1, 2, 11, 22, 29, 58, 319, 638
GCD of numbers is the greatest common divisor
So, the GCD (402, 780, 638) = 2.
Given numbers are 402, 780, 638
The list of prime factors of all numbers are
Prime factors of 402 are 2 x 3 x 67
Prime factors of 780 are 2 x 2 x 3 x 5 x 13
Prime factors of 638 are 2 x 11 x 29
The highest common occurrence is 21
Therefore, GCD of 402, 780, 638 is 2.
Steps to Calculate GCD of 402, 780, 638 using LCM Formula
Given numbers are 402, 780, 638
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(402, 780) = 52260
GCD(402, 780) = ( 402 x 780 ) / 52260
= 402 / 780
= 402
Step2:
LCM(6, 638) = 1914
GCD(6, 638) = ( 6 x 638 ) / 1914
= 6 / 638
= 6
So, Greatest Common Divisor of 402, 780, 638 is 2
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 402, 780, 638
Given numbers are 402, 780, 638
The greatest common divisor of numbers 402, 780, 638 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 402, 780, 638 is 2.
FAQs on GCD of 402, 780, 638 Calculator
1. What is the GCD of 402, 780, 638?
GCD of given numbers 402, 780, 638 is 2
2. How to calculate the greatest common divisor of 402, 780, 638?
We can find the highest common divisor of 402, 780, 638 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 402, 780, 638 i.e 2.
3. How can I use the GCD of 402, 780, 638Calculator?
Out the numbers 402, 780, 638 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.