GCD of 991, 391, 655, 987 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 991, 391, 655, 987 quickly. Get the easiest ways to solve the greatest common divisor of 991, 391, 655, 987 i.e 1 in different methods as follows.
Given Input numbers are 991, 391, 655, 987
In the factoring method, we have to find the divisors of all numbers
Divisors of 991 :
The positive integer divisors of 991 that completely divides 991 are.
1, 991
Divisors of 391 :
The positive integer divisors of 391 that completely divides 391 are.
1, 17, 23, 391
Divisors of 655 :
The positive integer divisors of 655 that completely divides 655 are.
1, 5, 131, 655
Divisors of 987 :
The positive integer divisors of 987 that completely divides 987 are.
1, 3, 7, 21, 47, 141, 329, 987
GCD of numbers is the greatest common divisor
So, the GCD (991, 391, 655, 987) = 1.
Given numbers are 991, 391, 655, 987
The list of prime factors of all numbers are
Prime factors of 991 are 991
Prime factors of 391 are 17 x 23
Prime factors of 655 are 5 x 131
Prime factors of 987 are 3 x 7 x 47
The above numbers do not have any common prime factor. So GCD is 1
Steps to Calculate GCD of 991, 391, 655, 987 using LCM Formula
Given numbers are 991, 391, 655, 987
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(991, 391) = 387481
GCD(991, 391) = ( 991 x 391 ) / 387481
= 991 / 391
= 991
Step2:
LCM(1, 655) = 655
GCD(1, 655) = ( 1 x 655 ) / 655
= 1 / 655
= 1
Step3:
LCM(1, 987) = 987
GCD(1, 987) = ( 1 x 987 ) / 987
= 1 / 987
= 1
So, Greatest Common Divisor of 991, 391, 655, 987 is 1
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 991, 391, 655, 987
Given numbers are 991, 391, 655, 987
The greatest common divisor of numbers 991, 391, 655, 987 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 991, 391, 655, 987 is 1.
FAQs on GCD of 991, 391, 655, 987 Calculator
1. What is the GCD of 991, 391, 655, 987?
GCD of given numbers 991, 391, 655, 987 is 1
2. How to calculate the greatest common divisor of 991, 391, 655, 987?
We can find the highest common divisor of 991, 391, 655, 987 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 991, 391, 655, 987 i.e 1.
3. How can I use the GCD of 991, 391, 655, 987Calculator?
Out the numbers 991, 391, 655, 987 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.