LCM of 217, 205, 435, 638
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 217, 205, 435, 638 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 217, 205, 435, 638. So, keep reading to learn more.
Given numbers are 217,205,435,638
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 217,205,435,638 is 85144290.
Find LCM of 217,205,435,638 with Prime Factorization
| 5 | 217, 205, 435, 638 |
| 29 | 217, 41, 87, 638 |
| 217, 41, 3, 22 |
Multiply the prime numbers at the bottom and the left side.
5 x 29 x 217 x 41 x 3 x 22 = 85144290
Therefore, the lowest common multiple of 217,205,435,638 is 85144290.
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.
217 x 205 x 435 x 638 = 12345922050
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.
217 : 1, 7, 31, 217
205 : 1, 5, 41, 205
435 : 1, 3, 5, 15, 29, 87, 145, 435
638 : 1, 2, 11, 22, 29, 58, 319, 638
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 217,205,435,638, is 1.
Now, the common factors can be found like this.
217:7x 31
205:5x 41
435:3x 5x 29
638:2x 11x 29
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
5x 29 = 145
Therefore, the value for common factors is 145.
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 = 12345922050/(1x145)
LCM = 12345922050/145
LCM = 85144290
Thus, we can understand that the LCM of 217,205,435,638 is 85144290.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 217, 205, 435, 638
1. What is the LCM of 217, 205, 435, 638?
Answer: LCM of 217, 205, 435, 638 is 85144290.
2. How to calculate the LCM of 217, 205, 435, 638?
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 217, 205, 435, 638.
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}.