GCD of 645, 390, 670 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 645, 390, 670 quickly. Get the easiest ways to solve the greatest common divisor of 645, 390, 670 i.e 5 in different methods as follows.
Given Input numbers are 645, 390, 670
In the factoring method, we have to find the divisors of all numbers
Divisors of 645 :
The positive integer divisors of 645 that completely divides 645 are.
1, 3, 5, 15, 43, 129, 215, 645
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
Divisors of 670 :
The positive integer divisors of 670 that completely divides 670 are.
1, 2, 5, 10, 67, 134, 335, 670
GCD of numbers is the greatest common divisor
So, the GCD (645, 390, 670) = 5.
Given numbers are 645, 390, 670
The list of prime factors of all numbers are
Prime factors of 645 are 3 x 5 x 43
Prime factors of 390 are 2 x 3 x 5 x 13
Prime factors of 670 are 2 x 5 x 67
The highest common occurrence is 51
Therefore, GCD of 645, 390, 670 is 5.
Steps to Calculate GCD of 645, 390, 670 using LCM Formula
Given numbers are 645, 390, 670
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(645, 390) = 16770
GCD(645, 390) = ( 645 x 390 ) / 16770
= 645 / 390
= 645
Step2:
LCM(15, 670) = 2010
GCD(15, 670) = ( 15 x 670 ) / 2010
= 15 / 670
= 15
So, Greatest Common Divisor of 645, 390, 670 is 5
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 645, 390, 670
Given numbers are 645, 390, 670
The greatest common divisor of numbers 645, 390, 670 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 645, 390, 670 is 5.
FAQs on GCD of 645, 390, 670 Calculator
1. What is the GCD of 645, 390, 670?
GCD of given numbers 645, 390, 670 is 5
2. How to calculate the greatest common divisor of 645, 390, 670?
We can find the highest common divisor of 645, 390, 670 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 645, 390, 670 i.e 5.
3. How can I use the GCD of 645, 390, 670Calculator?
Out the numbers 645, 390, 670 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.