LCM of 813, 640, 643, 285
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 813, 640, 643, 285 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 813, 640, 643, 285. So, keep reading to learn more.
Given numbers are 813,640,643,285
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 813,640,643,285 is 6356749440.
Find LCM of 813,640,643,285 with Prime Factorization
| 3 | 813, 640, 643, 285 |
| 5 | 271, 640, 643, 95 |
| 271, 128, 643, 19 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 271 x 128 x 643 x 19 = 6356749440
Therefore, the lowest common multiple of 813,640,643,285 is 6356749440.
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.
813 x 640 x 643 x 285 = 95351241600
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.
813 : 1, 3, 271, 813
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
643 : 1, 643
285 : 1, 3, 5, 15, 19, 57, 95, 285
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 813,640,643,285, is 1.
Now, the common factors can be found like this.
813:3x 271
640:2x 2x 2x 2x 2x 2x 2x 5
643:643
285:3x 5x 19
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 5 = 15
Therefore, the value for common factors is 15.
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 = 95351241600/(1x15)
LCM = 95351241600/15
LCM = 6356749440
Thus, we can understand that the LCM of 813,640,643,285 is 6356749440.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 813, 640, 643, 285
1. What is the LCM of 813, 640, 643, 285?
Answer: LCM of 813, 640, 643, 285 is 6356749440.
2. How to calculate the LCM of 813, 640, 643, 285?
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 813, 640, 643, 285.
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}.