Find the LCM of 687, 428, 806, 640 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 687, 428, 806, 640. So, keep reading to learn more.
Given numbers are 687,428,806,640
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 687,428,806,640 is 18959441280.
Find LCM of 687,428,806,640 with Prime Factorization
2 | 687, 428, 806, 640 |
2 | 687, 214, 403, 320 |
687, 107, 403, 160 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 687 x 107 x 403 x 160 = 18959441280
Therefore, the lowest common multiple of 687,428,806,640 is 18959441280.
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.
687 x 428 x 806 x 640 = 151675530240
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.
687 : 1, 3, 229, 687
428 : 1, 2, 4, 107, 214, 428
806 : 1, 2, 13, 26, 31, 62, 403, 806
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 687,428,806,640, is 1.
Now, the common factors can be found like this.
687:3x 229
428:2x 2x 107
806:2x 13x 31
640:2x 2x 2x 2x 2x 2x 2x 5
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 2 = 8
Therefore, the value for common factors is 8.
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 = 151675530240/(1x8)
LCM = 151675530240/8
LCM = 18959441280
Thus, we can understand that the LCM of 687,428,806,640 is 18959441280.
Here are some samples of LCM of two or more Numbers calculations.
1. What is the LCM of 687, 428, 806, 640?
Answer: LCM of 687, 428, 806, 640 is 18959441280.
2. How to calculate the LCM of 687, 428, 806, 640?
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 687, 428, 806, 640.
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}.