LCM of 717, 638, 870, 861
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 717, 638, 870, 861 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 717, 638, 870, 861. So, keep reading to learn more.
Given numbers are 717,638,870,861
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 717,638,870,861 is 656435010.
Find LCM of 717,638,870,861 with Prime Factorization
| 2 | 717, 638, 870, 861 |
| 3 | 717, 319, 435, 861 |
| 29 | 239, 319, 145, 287 |
| 239, 11, 5, 287 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 29 x 239 x 11 x 5 x 287 = 656435010
Therefore, the lowest common multiple of 717,638,870,861 is 656435010.
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.
717 x 638 x 870 x 861 = 342659075220
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.
717 : 1, 3, 239, 717
638 : 1, 2, 11, 22, 29, 58, 319, 638
870 : 1, 2, 3, 5, 6, 10, 15, 29, 30, 58, 87, 145, 174, 290, 435, 870
861 : 1, 3, 7, 21, 41, 123, 287, 861
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 717,638,870,861, is 1.
Now, the common factors can be found like this.
717:3x 239
638:2x 11x 29
870:2x 3x 5x 29
861:3x 7x 41
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 3x 29 = 522
Therefore, the value for common factors is 522.
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 = 342659075220/(1x522)
LCM = 342659075220/522
LCM = 656435010
Thus, we can understand that the LCM of 717,638,870,861 is 656435010.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 717, 638, 870, 861
1. What is the LCM of 717, 638, 870, 861?
Answer: LCM of 717, 638, 870, 861 is 656435010.
2. How to calculate the LCM of 717, 638, 870, 861?
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 717, 638, 870, 861.
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}.