GCD of 120, 309, 390 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 120, 309, 390 quickly. Get the easiest ways to solve the greatest common divisor of 120, 309, 390 i.e 3 in different methods as follows.
Given Input numbers are 120, 309, 390
In the factoring method, we have to find the divisors of all numbers
Divisors of 120 :
The positive integer divisors of 120 that completely divides 120 are.
1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
Divisors of 309 :
The positive integer divisors of 309 that completely divides 309 are.
1, 3, 103, 309
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 (120, 309, 390) = 3.
Given numbers are 120, 309, 390
The list of prime factors of all numbers are
Prime factors of 120 are 2 x 2 x 2 x 3 x 5
Prime factors of 309 are 3 x 103
Prime factors of 390 are 2 x 3 x 5 x 13
The highest common occurrence is 31
Therefore, GCD of 120, 309, 390 is 3.
Steps to Calculate GCD of 120, 309, 390 using LCM Formula
Given numbers are 120, 309, 390
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(120, 309) = 12360
GCD(120, 309) = ( 120 x 309 ) / 12360
= 120 / 309
= 120
Step2:
LCM(3, 390) = 390
GCD(3, 390) = ( 3 x 390 ) / 390
= 3 / 390
= 3
So, Greatest Common Divisor of 120, 309, 390 is 3
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 120, 309, 390
Given numbers are 120, 309, 390
The greatest common divisor of numbers 120, 309, 390 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 120, 309, 390 is 3.
FAQs on GCD of 120, 309, 390 Calculator
1. What is the GCD of 120, 309, 390?
GCD of given numbers 120, 309, 390 is 3
2. How to calculate the greatest common divisor of 120, 309, 390?
We can find the highest common divisor of 120, 309, 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 120, 309, 390 i.e 3.
3. How can I use the GCD of 120, 309, 390Calculator?
Out the numbers 120, 309, 390 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.