LCM of 408, 643, 731, 990, 638
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 408, 643, 731, 990, 638 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 408, 643, 731, 990, 638. So, keep reading to learn more.
Given numbers are 408,643,731,990,638
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 408,643,731,990,638 is 53978589720.
Find LCM of 408,643,731,990,638 with Prime Factorization
| 2 | 408, 643, 731, 990, 638 |
| 3 | 204, 643, 731, 495, 319 |
| 11 | 68, 643, 731, 165, 319 |
| 17 | 68, 643, 731, 15, 29 |
| 4, 643, 43, 15, 29 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 11 x 17 x 4 x 643 x 43 x 15 x 29 = 53978589720
Therefore, the lowest common multiple of 408,643,731,990,638 is 53978589720.
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.
408 x 643 x 731 x 990 x 638 = 121127955331680
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.
408 : 1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 102, 136, 204, 408
643 : 1, 643
731 : 1, 17, 43, 731
990 : 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
638 : 1, 2, 11, 22, 29, 58, 319, 638
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 408,643,731,990,638, is 1.
Now, the common factors can be found like this.
408:2x 2x 2x 3x 17
643:643
731:17x 43
990:2x 3x 3x 5x 11
638:2x 11x 29
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 3x 11x 17 = 2244
Therefore, the value for common factors is 2244.
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 = 121127955331680/(1x2244)
LCM = 121127955331680/2244
LCM = 53978589720
Thus, we can understand that the LCM of 408,643,731,990,638 is 53978589720.
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FAQs on LCM of 408, 643, 731, 990, 638
1. What is the LCM of 408, 643, 731, 990, 638?
Answer: LCM of 408, 643, 731, 990, 638 is 53978589720.
2. How to calculate the LCM of 408, 643, 731, 990, 638?
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 408, 643, 731, 990, 638.
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}.