Online GCD Calculator is useful to find the GCD of 155, 408, 780, 791 quickly. Get the easiest ways to solve the greatest common divisor of 155, 408, 780, 791 i.e 1 in different methods as follows.
Given Input numbers are 155, 408, 780, 791
In the factoring method, we have to find the divisors of all numbers
Divisors of 155 :
The positive integer divisors of 155 that completely divides 155 are.
1, 5, 31, 155
Divisors of 408 :
The positive integer divisors of 408 that completely divides 408 are.
1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 102, 136, 204, 408
Divisors of 780 :
The positive integer divisors of 780 that completely divides 780 are.
1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
Divisors of 791 :
The positive integer divisors of 791 that completely divides 791 are.
1, 7, 113, 791
GCD of numbers is the greatest common divisor
So, the GCD (155, 408, 780, 791) = 1.
Given numbers are 155, 408, 780, 791
The list of prime factors of all numbers are
Prime factors of 155 are 5 x 31
Prime factors of 408 are 2 x 2 x 2 x 3 x 17
Prime factors of 780 are 2 x 2 x 3 x 5 x 13
Prime factors of 791 are 7 x 113
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 155, 408, 780, 791
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(155, 408) = 63240
GCD(155, 408) = ( 155 x 408 ) / 63240
= 155 / 408
= 155
Step2:
LCM(1, 780) = 780
GCD(1, 780) = ( 1 x 780 ) / 780
= 1 / 780
= 1
Step3:
LCM(1, 791) = 791
GCD(1, 791) = ( 1 x 791 ) / 791
= 1 / 791
= 1
So, Greatest Common Divisor of 155, 408, 780, 791 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 155, 408, 780, 791
The greatest common divisor of numbers 155, 408, 780, 791 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 155, 408, 780, 791 is 1.
1. What is the GCD of 155, 408, 780, 791?
GCD of given numbers 155, 408, 780, 791 is 1
2. How to calculate the greatest common divisor of 155, 408, 780, 791?
We can find the highest common divisor of 155, 408, 780, 791 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 155, 408, 780, 791 i.e 1.
3. How can I use the GCD of 155, 408, 780, 791Calculator?
Out the numbers 155, 408, 780, 791 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.