LCM of 638, 936, 717, 891
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 638, 936, 717, 891 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, 936, 717, 891. So, keep reading to learn more.
Given numbers are 638,936,717,891
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 638,936,717,891 is 642254184.
Find LCM of 638,936,717,891 with Prime Factorization
| 2 | 638, 936, 717, 891 |
| 3 | 319, 468, 717, 891 |
| 3 | 319, 156, 239, 297 |
| 11 | 319, 52, 239, 99 |
| 29, 52, 239, 9 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 11 x 29 x 52 x 239 x 9 = 642254184
Therefore, the lowest common multiple of 638,936,717,891 is 642254184.
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 936 x 717 x 891 = 381498985296
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
936 : 1, 2, 3, 4, 6, 8, 9, 12, 13, 18, 24, 26, 36, 39, 52, 72, 78, 104, 117, 156, 234, 312, 468, 936
717 : 1, 3, 239, 717
891 : 1, 3, 9, 11, 27, 33, 81, 99, 297, 891
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 638,936,717,891, is 1.
Now, the common factors can be found like this.
638:2x 11x 29
936:2x 2x 2x 3x 3x 13
717:3x 239
891:3x 3x 3x 3x 11
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 3x 11 = 594
Therefore, the value for common factors is 594.
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 = 381498985296/(1x594)
LCM = 381498985296/594
LCM = 642254184
Thus, we can understand that the LCM of 638,936,717,891 is 642254184.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 638, 936, 717, 891
1. What is the LCM of 638, 936, 717, 891?
Answer: LCM of 638, 936, 717, 891 is 642254184.
2. How to calculate the LCM of 638, 936, 717, 891?
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, 936, 717, 891.
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}.