Online GCD Calculator is useful to find the GCD of 428, 209, 251, 660 quickly. Get the easiest ways to solve the greatest common divisor of 428, 209, 251, 660 i.e 1 in different methods as follows.
Given Input numbers are 428, 209, 251, 660
In the factoring method, we have to find the divisors of all numbers
Divisors of 428 :
The positive integer divisors of 428 that completely divides 428 are.
1, 2, 4, 107, 214, 428
Divisors of 209 :
The positive integer divisors of 209 that completely divides 209 are.
1, 11, 19, 209
Divisors of 251 :
The positive integer divisors of 251 that completely divides 251 are.
1, 251
Divisors of 660 :
The positive integer divisors of 660 that completely divides 660 are.
1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660
GCD of numbers is the greatest common divisor
So, the GCD (428, 209, 251, 660) = 1.
Given numbers are 428, 209, 251, 660
The list of prime factors of all numbers are
Prime factors of 428 are 2 x 2 x 107
Prime factors of 209 are 11 x 19
Prime factors of 251 are 251
Prime factors of 660 are 2 x 2 x 3 x 5 x 11
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 428, 209, 251, 660
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(428, 209) = 89452
GCD(428, 209) = ( 428 x 209 ) / 89452
= 428 / 209
= 428
Step2:
LCM(1, 251) = 251
GCD(1, 251) = ( 1 x 251 ) / 251
= 1 / 251
= 1
Step3:
LCM(1, 660) = 660
GCD(1, 660) = ( 1 x 660 ) / 660
= 1 / 660
= 1
So, Greatest Common Divisor of 428, 209, 251, 660 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 428, 209, 251, 660
The greatest common divisor of numbers 428, 209, 251, 660 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 428, 209, 251, 660 is 1.
1. What is the GCD of 428, 209, 251, 660?
GCD of given numbers 428, 209, 251, 660 is 1
2. How to calculate the greatest common divisor of 428, 209, 251, 660?
We can find the highest common divisor of 428, 209, 251, 660 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 428, 209, 251, 660 i.e 1.
3. How can I use the GCD of 428, 209, 251, 660Calculator?
Out the numbers 428, 209, 251, 660 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.