GCD of 780, 645, 240 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 780, 645, 240 quickly. Get the easiest ways to solve the greatest common divisor of 780, 645, 240 i.e 15 in different methods as follows.
Given Input numbers are 780, 645, 240
In the factoring method, we have to find the divisors of all numbers
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 645 :
The positive integer divisors of 645 that completely divides 645 are.
1, 3, 5, 15, 43, 129, 215, 645
Divisors of 240 :
The positive integer divisors of 240 that completely divides 240 are.
1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240
GCD of numbers is the greatest common divisor
So, the GCD (780, 645, 240) = 15.
Given numbers are 780, 645, 240
The list of prime factors of all numbers are
Prime factors of 780 are 2 x 2 x 3 x 5 x 13
Prime factors of 645 are 3 x 5 x 43
Prime factors of 240 are 2 x 2 x 2 x 2 x 3 x 5
The highest common occurrence is 31 x 51
Therefore, GCD of 780, 645, 240 is 15.
Steps to Calculate GCD of 780, 645, 240 using LCM Formula
Given numbers are 780, 645, 240
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(780, 645) = 33540
GCD(780, 645) = ( 780 x 645 ) / 33540
= 780 / 645
= 780
Step2:
LCM(15, 240) = 240
GCD(15, 240) = ( 15 x 240 ) / 240
= 15 / 240
= 15
So, Greatest Common Divisor of 780, 645, 240 is 15
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 780, 645, 240
Given numbers are 780, 645, 240
The greatest common divisor of numbers 780, 645, 240 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 780, 645, 240 is 15.
FAQs on GCD of 780, 645, 240 Calculator
1. What is the GCD of 780, 645, 240?
GCD of given numbers 780, 645, 240 is 15
2. How to calculate the greatest common divisor of 780, 645, 240?
We can find the highest common divisor of 780, 645, 240 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 780, 645, 240 i.e 15.
3. How can I use the GCD of 780, 645, 240Calculator?
Out the numbers 780, 645, 240 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.