GCD of 77, 63, 61, 20 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 77, 63, 61, 20 quickly. Get the easiest ways to solve the greatest common divisor of 77, 63, 61, 20 i.e 1 in different methods as follows.
Given Input numbers are 77, 63, 61, 20
In the factoring method, we have to find the divisors of all numbers
Divisors of 77 :
The positive integer divisors of 77 that completely divides 77 are.
1, 7, 11, 77
Divisors of 63 :
The positive integer divisors of 63 that completely divides 63 are.
1, 3, 7, 9, 21, 63
Divisors of 61 :
The positive integer divisors of 61 that completely divides 61 are.
1, 61
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 (77, 63, 61, 20) = 1.
Given numbers are 77, 63, 61, 20
The list of prime factors of all numbers are
Prime factors of 77 are 7 x 11
Prime factors of 63 are 3 x 3 x 7
Prime factors of 61 are 61
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 77, 63, 61, 20 using LCM Formula
Given numbers are 77, 63, 61, 20
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(77, 63) = 693
GCD(77, 63) = ( 77 x 63 ) / 693
= 77 / 63
= 77
Step2:
LCM(7, 61) = 427
GCD(7, 61) = ( 7 x 61 ) / 427
= 7 / 61
= 7
Step3:
LCM(1, 20) = 20
GCD(1, 20) = ( 1 x 20 ) / 20
= 1 / 20
= 1
So, Greatest Common Divisor of 77, 63, 61, 20 is 1
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 77, 63, 61, 20
Given numbers are 77, 63, 61, 20
The greatest common divisor of numbers 77, 63, 61, 20 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 77, 63, 61, 20 is 1.
FAQs on GCD of 77, 63, 61, 20 Calculator
1. What is the GCD of 77, 63, 61, 20?
GCD of given numbers 77, 63, 61, 20 is 1
2. How to calculate the greatest common divisor of 77, 63, 61, 20?
We can find the highest common divisor of 77, 63, 61, 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 77, 63, 61, 20 i.e 1.
3. How can I use the GCD of 77, 63, 61, 20Calculator?
Out the numbers 77, 63, 61, 20 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.