GCD of 56, 87, 42, 20 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 56, 87, 42, 20 quickly. Get the easiest ways to solve the greatest common divisor of 56, 87, 42, 20 i.e 1 in different methods as follows.
Given Input numbers are 56, 87, 42, 20
In the factoring method, we have to find the divisors of all numbers
Divisors of 56 :
The positive integer divisors of 56 that completely divides 56 are.
1, 2, 4, 7, 8, 14, 28, 56
Divisors of 87 :
The positive integer divisors of 87 that completely divides 87 are.
1, 3, 29, 87
Divisors of 42 :
The positive integer divisors of 42 that completely divides 42 are.
1, 2, 3, 6, 7, 14, 21, 42
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 (56, 87, 42, 20) = 1.
Given numbers are 56, 87, 42, 20
The list of prime factors of all numbers are
Prime factors of 56 are 2 x 2 x 2 x 7
Prime factors of 87 are 3 x 29
Prime factors of 42 are 2 x 3 x 7
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 56, 87, 42, 20 using LCM Formula
Given numbers are 56, 87, 42, 20
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(56, 87) = 4872
GCD(56, 87) = ( 56 x 87 ) / 4872
= 56 / 87
= 56
Step2:
LCM(1, 42) = 42
GCD(1, 42) = ( 1 x 42 ) / 42
= 1 / 42
= 1
Step3:
LCM(1, 20) = 20
GCD(1, 20) = ( 1 x 20 ) / 20
= 1 / 20
= 1
So, Greatest Common Divisor of 56, 87, 42, 20 is 1
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 56, 87, 42, 20
Given numbers are 56, 87, 42, 20
The greatest common divisor of numbers 56, 87, 42, 20 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 56, 87, 42, 20 is 1.
FAQs on GCD of 56, 87, 42, 20 Calculator
1. What is the GCD of 56, 87, 42, 20?
GCD of given numbers 56, 87, 42, 20 is 1
2. How to calculate the greatest common divisor of 56, 87, 42, 20?
We can find the highest common divisor of 56, 87, 42, 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 56, 87, 42, 20 i.e 1.
3. How can I use the GCD of 56, 87, 42, 20Calculator?
Out the numbers 56, 87, 42, 20 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.