LCM of 638, 899, 805, 643, 490
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 638, 899, 805, 643, 490 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 638, 899, 805, 643, 490. So, keep reading to learn more.
Given numbers are 638,899,805,643,490
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 638,899,805,643,490 is 71661726290.
Find LCM of 638,899,805,643,490 with Prime Factorization
| 2 | 638, 899, 805, 643, 490 |
| 5 | 319, 899, 805, 643, 245 |
| 7 | 319, 899, 161, 643, 49 |
| 29 | 319, 899, 23, 643, 7 |
| 11, 31, 23, 643, 7 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 7 x 29 x 11 x 31 x 23 x 643 x 7 = 71661726290
Therefore, the lowest common multiple of 638,899,805,643,490 is 71661726290.
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.
638 x 899 x 805 x 643 x 490 = 145473304368700
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.
638 : 1, 2, 11, 22, 29, 58, 319, 638
899 : 1, 29, 31, 899
805 : 1, 5, 7, 23, 35, 115, 161, 805
643 : 1, 643
490 : 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 638,899,805,643,490, is 1.
Now, the common factors can be found like this.
638:2x 11x 29
899:29x 31
805:5x 7x 23
643:643
490:2x 5x 7x 7
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 7x 29 = 2030
Therefore, the value for common factors is 2030.
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 = 145473304368700/(1x2030)
LCM = 145473304368700/2030
LCM = 71661726290
Thus, we can understand that the LCM of 638,899,805,643,490 is 71661726290.
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FAQs on LCM of 638, 899, 805, 643, 490
1. What is the LCM of 638, 899, 805, 643, 490?
Answer: LCM of 638, 899, 805, 643, 490 is 71661726290.
2. How to calculate the LCM of 638, 899, 805, 643, 490?
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 638, 899, 805, 643, 490.
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}.