LCM of 912, 687, 861, 647, 420
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 912, 687, 861, 647, 420 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 912, 687, 861, 647, 420. So, keep reading to learn more.
Given numbers are 912,687,861,647,420
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 912,687,861,647,420 is 193903881360.
Find LCM of 912,687,861,647,420 with Prime Factorization
| 2 | 912, 687, 861, 647, 420 |
| 2 | 456, 687, 861, 647, 210 |
| 3 | 228, 687, 861, 647, 105 |
| 7 | 76, 229, 287, 647, 35 |
| 76, 229, 41, 647, 5 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 7 x 76 x 229 x 41 x 647 x 5 = 193903881360
Therefore, the lowest common multiple of 912,687,861,647,420 is 193903881360.
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.
912 x 687 x 861 x 647 x 420 = 146591334308160
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.
912 : 1, 2, 3, 4, 6, 8, 12, 16, 19, 24, 38, 48, 57, 76, 114, 152, 228, 304, 456, 912
687 : 1, 3, 229, 687
861 : 1, 3, 7, 21, 41, 123, 287, 861
647 : 1, 647
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 912,687,861,647,420, is 1.
Now, the common factors can be found like this.
912:2x 2x 2x 2x 3x 19
687:3x 229
861:3x 7x 41
647:647
420:2x 2x 3x 5x 7
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 3x 7 = 756
Therefore, the value for common factors is 756.
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 = 146591334308160/(1x756)
LCM = 146591334308160/756
LCM = 193903881360
Thus, we can understand that the LCM of 912,687,861,647,420 is 193903881360.
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FAQs on LCM of 912, 687, 861, 647, 420
1. What is the LCM of 912, 687, 861, 647, 420?
Answer: LCM of 912, 687, 861, 647, 420 is 193903881360.
2. How to calculate the LCM of 912, 687, 861, 647, 420?
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 912, 687, 861, 647, 420.
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}.