LCM of 686, 680, 780, 903
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 686, 680, 780, 903 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 686, 680, 780, 903. So, keep reading to learn more.
Given numbers are 686,680,780,903
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 686,680,780,903 is 391143480.
Find LCM of 686,680,780,903 with Prime Factorization
| 2 | 686, 680, 780, 903 |
| 2 | 343, 340, 390, 903 |
| 3 | 343, 170, 195, 903 |
| 5 | 343, 170, 65, 301 |
| 7 | 343, 34, 13, 301 |
| 49, 34, 13, 43 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 7 x 49 x 34 x 13 x 43 = 391143480
Therefore, the lowest common multiple of 686,680,780,903 is 391143480.
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.
686 x 680 x 780 x 903 = 328560523200
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.
686 : 1, 2, 7, 14, 49, 98, 343, 686
680 : 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680
780 : 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
903 : 1, 3, 7, 21, 43, 129, 301, 903
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 686,680,780,903, is 1.
Now, the common factors can be found like this.
686:2x 7x 7x 7
680:2x 2x 2x 5x 17
780:2x 2x 3x 5x 13
903:3x 7x 43
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 2x 3x 5x 7 = 840
Therefore, the value for common factors is 840.
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 = 328560523200/(1x840)
LCM = 328560523200/840
LCM = 391143480
Thus, we can understand that the LCM of 686,680,780,903 is 391143480.
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FAQs on LCM of 686, 680, 780, 903
1. What is the LCM of 686, 680, 780, 903?
Answer: LCM of 686, 680, 780, 903 is 391143480.
2. How to calculate the LCM of 686, 680, 780, 903?
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 686, 680, 780, 903.
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}.