LCM of 641, 910, 638, 770
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 641, 910, 638, 770 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 641, 910, 638, 770. So, keep reading to learn more.
Given numbers are 641,910,638,770
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 641,910,638,770 is 186075890.
Find LCM of 641,910,638,770 with Prime Factorization
| 2 | 641, 910, 638, 770 |
| 5 | 641, 455, 319, 385 |
| 7 | 641, 91, 319, 77 |
| 11 | 641, 13, 319, 11 |
| 641, 13, 29, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 7 x 11 x 641 x 13 x 29 x 1 = 186075890
Therefore, the lowest common multiple of 641,910,638,770 is 186075890.
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.
641 x 910 x 638 x 770 = 286556870600
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.
641 : 1, 641
910 : 1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 130, 182, 455, 910
638 : 1, 2, 11, 22, 29, 58, 319, 638
770 : 1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 641,910,638,770, is 1.
Now, the common factors can be found like this.
641:641
910:2x 5x 7x 13
638:2x 11x 29
770:2x 5x 7x 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 2x 5x 7x 11 = 1540
Therefore, the value for common factors is 1540.
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 = 286556870600/(1x1540)
LCM = 286556870600/1540
LCM = 186075890
Thus, we can understand that the LCM of 641,910,638,770 is 186075890.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 641, 910, 638, 770
1. What is the LCM of 641, 910, 638, 770?
Answer: LCM of 641, 910, 638, 770 is 186075890.
2. How to calculate the LCM of 641, 910, 638, 770?
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 641, 910, 638, 770.
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}.