LCM of 428, 782, 638, 408
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 428, 782, 638, 408 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, 782, 638, 408. So, keep reading to learn more.
Given numbers are 428,782,638,408
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 428,782,638,408 is 320304072.
Find LCM of 428,782,638,408 with Prime Factorization
| 2 | 428, 782, 638, 408 |
| 2 | 214, 391, 319, 204 |
| 17 | 107, 391, 319, 102 |
| 107, 23, 319, 6 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 17 x 107 x 23 x 319 x 6 = 320304072
Therefore, the lowest common multiple of 428,782,638,408 is 320304072.
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 782 x 638 x 408 = 87122707584
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
782 : 1, 2, 17, 23, 34, 46, 391, 782
638 : 1, 2, 11, 22, 29, 58, 319, 638
408 : 1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 102, 136, 204, 408
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 428,782,638,408, is 2.
Now, the common factors can be found like this.
428:2x 2x 107
782:2x 17x 23
638:2x 11x 29
408:2x 2x 2x 3x 17
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 2x 17 = 136
Therefore, the value for common factors is 136.
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 = 87122707584/(2x136)
LCM = 87122707584/272
LCM = 320304072
Thus, we can understand that the LCM of 428,782,638,408 is 320304072.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 428, 782, 638, 408
1. What is the LCM of 428, 782, 638, 408?
Answer: LCM of 428, 782, 638, 408 is 320304072.
2. How to calculate the LCM of 428, 782, 638, 408?
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, 782, 638, 408.
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}.