LCM of 638, 203, 686, 957
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 638, 203, 686, 957 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, 203, 686, 957. So, keep reading to learn more.
Given numbers are 638,203,686,957
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 638,203,686,957 is 656502.
Find LCM of 638,203,686,957 with Prime Factorization
| 2 | 638, 203, 686, 957 |
| 7 | 319, 203, 343, 957 |
| 11 | 319, 29, 49, 957 |
| 29 | 29, 29, 49, 87 |
| 1, 1, 49, 3 |
Multiply the prime numbers at the bottom and the left side.
2 x 7 x 11 x 29 x 1 x 1 x 49 x 3 = 656502
Therefore, the lowest common multiple of 638,203,686,957 is 656502.
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 203 x 686 x 957 = 85026200028
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
203 : 1, 7, 29, 203
686 : 1, 2, 7, 14, 49, 98, 343, 686
957 : 1, 3, 11, 29, 33, 87, 319, 957
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 638,203,686,957, is 1.
Now, the common factors can be found like this.
638:2x 11x 29
203:7x 29
686:2x 7x 7x 7
957:3x 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.
2x 7x 11x 29x 29 = 129514
Therefore, the value for common factors is 129514.
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 = 85026200028/(1x129514)
LCM = 85026200028/129514
LCM = 656502
Thus, we can understand that the LCM of 638,203,686,957 is 656502.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 638, 203, 686, 957
1. What is the LCM of 638, 203, 686, 957?
Answer: LCM of 638, 203, 686, 957 is 656502.
2. How to calculate the LCM of 638, 203, 686, 957?
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, 203, 686, 957.
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}.