LCM of 405, 731, 640, 345
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 405, 731, 640, 345 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 405, 731, 640, 345. So, keep reading to learn more.
Given numbers are 405,731,640,345
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 405,731,640,345 is 871585920.
Find LCM of 405,731,640,345 with Prime Factorization
| 3 | 405, 731, 640, 345 |
| 5 | 135, 731, 640, 115 |
| 27, 731, 128, 23 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 27 x 731 x 128 x 23 = 871585920
Therefore, the lowest common multiple of 405,731,640,345 is 871585920.
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.
405 x 731 x 640 x 345 = 65368944000
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.
405 : 1, 3, 5, 9, 15, 27, 45, 81, 135, 405
731 : 1, 17, 43, 731
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
345 : 1, 3, 5, 15, 23, 69, 115, 345
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 405,731,640,345, is 1.
Now, the common factors can be found like this.
405:3x 3x 3x 3x 5
731:17x 43
640:2x 2x 2x 2x 2x 2x 2x 5
345:3x 5x 23
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 5x 5 = 75
Therefore, the value for common factors is 75.
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 = 65368944000/(1x75)
LCM = 65368944000/75
LCM = 871585920
Thus, we can understand that the LCM of 405,731,640,345 is 871585920.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 405, 731, 640, 345
1. What is the LCM of 405, 731, 640, 345?
Answer: LCM of 405, 731, 640, 345 is 871585920.
2. How to calculate the LCM of 405, 731, 640, 345?
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 405, 731, 640, 345.
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}.