GCD of 420, 639, 749 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 420, 639, 749 quickly. Get the easiest ways to solve the greatest common divisor of 420, 639, 749 i.e 1 in different methods as follows.
Given Input numbers are 420, 639, 749
In the factoring method, we have to find the divisors of all numbers
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
Divisors of 639 :
The positive integer divisors of 639 that completely divides 639 are.
1, 3, 9, 71, 213, 639
Divisors of 749 :
The positive integer divisors of 749 that completely divides 749 are.
1, 7, 107, 749
GCD of numbers is the greatest common divisor
So, the GCD (420, 639, 749) = 1.
Given numbers are 420, 639, 749
The list of prime factors of all numbers are
Prime factors of 420 are 2 x 2 x 3 x 5 x 7
Prime factors of 639 are 3 x 3 x 71
Prime factors of 749 are 7 x 107
The above numbers do not have any common prime factor. So GCD is 1
Steps to Calculate GCD of 420, 639, 749 using LCM Formula
Given numbers are 420, 639, 749
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(420, 639) = 89460
GCD(420, 639) = ( 420 x 639 ) / 89460
= 420 / 639
= 420
Step2:
LCM(3, 749) = 2247
GCD(3, 749) = ( 3 x 749 ) / 2247
= 3 / 749
= 3
So, Greatest Common Divisor of 420, 639, 749 is 1
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 420, 639, 749
Given numbers are 420, 639, 749
The greatest common divisor of numbers 420, 639, 749 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 420, 639, 749 is 1.
FAQs on GCD of 420, 639, 749 Calculator
1. What is the GCD of 420, 639, 749?
GCD of given numbers 420, 639, 749 is 1
2. How to calculate the greatest common divisor of 420, 639, 749?
We can find the highest common divisor of 420, 639, 749 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 420, 639, 749 i.e 1.
3. How can I use the GCD of 420, 639, 749Calculator?
Out the numbers 420, 639, 749 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.