GCD of 57, 65, 72, 20 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 57, 65, 72, 20 quickly. Get the easiest ways to solve the greatest common divisor of 57, 65, 72, 20 i.e 1 in different methods as follows.
Given Input numbers are 57, 65, 72, 20
In the factoring method, we have to find the divisors of all numbers
Divisors of 57 :
The positive integer divisors of 57 that completely divides 57 are.
1, 3, 19, 57
Divisors of 65 :
The positive integer divisors of 65 that completely divides 65 are.
1, 5, 13, 65
Divisors of 72 :
The positive integer divisors of 72 that completely divides 72 are.
1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
Divisors of 20 :
The positive integer divisors of 20 that completely divides 20 are.
1, 2, 4, 5, 10, 20
GCD of numbers is the greatest common divisor
So, the GCD (57, 65, 72, 20) = 1.
Given numbers are 57, 65, 72, 20
The list of prime factors of all numbers are
Prime factors of 57 are 3 x 19
Prime factors of 65 are 5 x 13
Prime factors of 72 are 2 x 2 x 2 x 3 x 3
Prime factors of 20 are 2 x 2 x 5
The above numbers do not have any common prime factor. So GCD is 1
Steps to Calculate GCD of 57, 65, 72, 20 using LCM Formula
Given numbers are 57, 65, 72, 20
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(57, 65) = 3705
GCD(57, 65) = ( 57 x 65 ) / 3705
= 57 / 65
= 57
Step2:
LCM(1, 72) = 72
GCD(1, 72) = ( 1 x 72 ) / 72
= 1 / 72
= 1
Step3:
LCM(1, 20) = 20
GCD(1, 20) = ( 1 x 20 ) / 20
= 1 / 20
= 1
So, Greatest Common Divisor of 57, 65, 72, 20 is 1
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 57, 65, 72, 20
Given numbers are 57, 65, 72, 20
The greatest common divisor of numbers 57, 65, 72, 20 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 57, 65, 72, 20 is 1.
FAQs on GCD of 57, 65, 72, 20 Calculator
1. What is the GCD of 57, 65, 72, 20?
GCD of given numbers 57, 65, 72, 20 is 1
2. How to calculate the greatest common divisor of 57, 65, 72, 20?
We can find the highest common divisor of 57, 65, 72, 20 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 57, 65, 72, 20 i.e 1.
3. How can I use the GCD of 57, 65, 72, 20Calculator?
Out the numbers 57, 65, 72, 20 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.