LCM of 428, 676, 645, 731
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 428, 676, 645, 731 with the LCM of Two or More Numbers Calculator. Here we are teaching you two different methods through which you can calculate the LCM of 428, 676, 645, 731. So, keep reading to learn more.
Given numbers are 428,676,645,731
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 428,676,645,731 is 793120380.
Find LCM of 428,676,645,731 with Prime Factorization
| 2 | 428, 676, 645, 731 |
| 2 | 214, 338, 645, 731 |
| 43 | 107, 169, 645, 731 |
| 107, 169, 15, 17 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 43 x 107 x 169 x 15 x 17 = 793120380
Therefore, the lowest common multiple of 428,676,645,731 is 793120380.
LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}
Firstly, we have to find the product of all the numbers.
428 x 676 x 645 x 731 = 136416705360
Then, let us find the GCF of these five numbers. To do so, we have to list down the factors for each number and choose the highest factor that is in all of the lists.
428 : 1, 2, 4, 107, 214, 428
676 : 1, 2, 4, 13, 26, 52, 169, 338, 676
645 : 1, 3, 5, 15, 43, 129, 215, 645
731 : 1, 17, 43, 731
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 428,676,645,731, is 1.
Now, the common factors can be found like this.
428:2x 2x 107
676:2x 2x 13x 13
645:3x 5x 43
731:17x 43
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 43 = 172
Therefore, the value for common factors is 172.
Now that we have all the elements of the formula, we can plug them in to calculate the LCM.
LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}
LCM = 136416705360/(1x172)
LCM = 136416705360/172
LCM = 793120380
Thus, we can understand that the LCM of 428,676,645,731 is 793120380.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 428, 676, 645, 731
1. What is the LCM of 428, 676, 645, 731?
Answer: LCM of 428, 676, 645, 731 is 793120380.
2. How to calculate the LCM of 428, 676, 645, 731?
The LCM can be found using two methods. You can either use the LCM formula or the prime factorization method to calculate the LCM of 428, 676, 645, 731.
3. What is the LCM formula?
The LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}.