LCM of 405, 391, 908, 872
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 405, 391, 908, 872 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, 391, 908, 872. So, keep reading to learn more.
Given numbers are 405,391,908,872
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 405,391,908,872 is 31345422120.
Find LCM of 405,391,908,872 with Prime Factorization
| 2 | 405, 391, 908, 872 |
| 2 | 405, 391, 454, 436 |
| 405, 391, 227, 218 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 405 x 391 x 227 x 218 = 31345422120
Therefore, the lowest common multiple of 405,391,908,872 is 31345422120.
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 391 x 908 x 872 = 125381688480
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
391 : 1, 17, 23, 391
908 : 1, 2, 4, 227, 454, 908
872 : 1, 2, 4, 8, 109, 218, 436, 872
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 405,391,908,872, is 1.
Now, the common factors can be found like this.
405:3x 3x 3x 3x 5
391:17x 23
908:2x 2x 227
872:2x 2x 2x 109
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2 = 4
Therefore, the value for common factors is 4.
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 = 125381688480/(1x4)
LCM = 125381688480/4
LCM = 31345422120
Thus, we can understand that the LCM of 405,391,908,872 is 31345422120.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 405, 391, 908, 872
1. What is the LCM of 405, 391, 908, 872?
Answer: LCM of 405, 391, 908, 872 is 31345422120.
2. How to calculate the LCM of 405, 391, 908, 872?
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, 391, 908, 872.
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}.