Online GCD Calculator is useful to find the GCD of 649, 137, 487, 420 quickly. Get the easiest ways to solve the greatest common divisor of 649, 137, 487, 420 i.e 1 in different methods as follows.
Given Input numbers are 649, 137, 487, 420
In the factoring method, we have to find the divisors of all numbers
Divisors of 649 :
The positive integer divisors of 649 that completely divides 649 are.
1, 11, 59, 649
Divisors of 137 :
The positive integer divisors of 137 that completely divides 137 are.
1, 137
Divisors of 487 :
The positive integer divisors of 487 that completely divides 487 are.
1, 487
Divisors of 420 :
The positive integer divisors of 420 that completely divides 420 are.
1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
GCD of numbers is the greatest common divisor
So, the GCD (649, 137, 487, 420) = 1.
Given numbers are 649, 137, 487, 420
The list of prime factors of all numbers are
Prime factors of 649 are 11 x 59
Prime factors of 137 are 137
Prime factors of 487 are 487
Prime factors of 420 are 2 x 2 x 3 x 5 x 7
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 649, 137, 487, 420
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(649, 137) = 88913
GCD(649, 137) = ( 649 x 137 ) / 88913
= 649 / 137
= 649
Step2:
LCM(1, 487) = 487
GCD(1, 487) = ( 1 x 487 ) / 487
= 1 / 487
= 1
Step3:
LCM(1, 420) = 420
GCD(1, 420) = ( 1 x 420 ) / 420
= 1 / 420
= 1
So, Greatest Common Divisor of 649, 137, 487, 420 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 649, 137, 487, 420
The greatest common divisor of numbers 649, 137, 487, 420 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 649, 137, 487, 420 is 1.
1. What is the GCD of 649, 137, 487, 420?
GCD of given numbers 649, 137, 487, 420 is 1
2. How to calculate the greatest common divisor of 649, 137, 487, 420?
We can find the highest common divisor of 649, 137, 487, 420 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 649, 137, 487, 420 i.e 1.
3. How can I use the GCD of 649, 137, 487, 420Calculator?
Out the numbers 649, 137, 487, 420 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.