LCM of 561, 715, 240, 638
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 561, 715, 240, 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 561, 715, 240, 638. So, keep reading to learn more.
Given numbers are 561,715,240,638
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 561,715,240,638 is 16919760.
Find LCM of 561,715,240,638 with Prime Factorization
| 2 | 561, 715, 240, 638 |
| 3 | 561, 715, 120, 319 |
| 5 | 187, 715, 40, 319 |
| 11 | 187, 143, 8, 319 |
| 17, 13, 8, 29 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 11 x 17 x 13 x 8 x 29 = 16919760
Therefore, the lowest common multiple of 561,715,240,638 is 16919760.
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.
561 x 715 x 240 x 638 = 61418728800
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.
561 : 1, 3, 11, 17, 33, 51, 187, 561
715 : 1, 5, 11, 13, 55, 65, 143, 715
240 : 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240
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 561,715,240,638, is 1.
Now, the common factors can be found like this.
561:3x 11x 17
715:5x 11x 13
240:2x 2x 2x 2x 3x 5
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.
2x 3x 5x 11x 11 = 3630
Therefore, the value for common factors is 3630.
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 = 61418728800/(1x3630)
LCM = 61418728800/3630
LCM = 16919760
Thus, we can understand that the LCM of 561,715,240,638 is 16919760.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 561, 715, 240, 638
1. What is the LCM of 561, 715, 240, 638?
Answer: LCM of 561, 715, 240, 638 is 16919760.
2. How to calculate the LCM of 561, 715, 240, 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 561, 715, 240, 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}.