LCM of 684, 681, 915, 920
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 684, 681, 915, 920 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 684, 681, 915, 920. So, keep reading to learn more.
Given numbers are 684,681,915,920
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 684,681,915,920 is 2178410040.
Find LCM of 684,681,915,920 with Prime Factorization
| 2 | 684, 681, 915, 920 |
| 2 | 342, 681, 915, 460 |
| 3 | 171, 681, 915, 230 |
| 5 | 57, 227, 305, 230 |
| 57, 227, 61, 46 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 57 x 227 x 61 x 46 = 2178410040
Therefore, the lowest common multiple of 684,681,915,920 is 2178410040.
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.
684 x 681 x 915 x 920 = 392113807200
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.
684 : 1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 76, 114, 171, 228, 342, 684
681 : 1, 3, 227, 681
915 : 1, 3, 5, 15, 61, 183, 305, 915
920 : 1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 684,681,915,920, is 1.
Now, the common factors can be found like this.
684:2x 2x 3x 3x 19
681:3x 227
915:3x 5x 61
920:2x 2x 2x 5x 23
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 3x 3x 5 = 180
Therefore, the value for common factors is 180.
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 = 392113807200/(1x180)
LCM = 392113807200/180
LCM = 2178410040
Thus, we can understand that the LCM of 684,681,915,920 is 2178410040.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 684, 681, 915, 920
1. What is the LCM of 684, 681, 915, 920?
Answer: LCM of 684, 681, 915, 920 is 2178410040.
2. How to calculate the LCM of 684, 681, 915, 920?
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 684, 681, 915, 920.
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}.