LCM of 686, 402, 420, 982
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 686, 402, 420, 982 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, 402, 420, 982. So, keep reading to learn more.
Given numbers are 686,402,420,982
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 686,402,420,982 is 677020260.
Find LCM of 686,402,420,982 with Prime Factorization
| 2 | 686, 402, 420, 982 |
| 3 | 343, 201, 210, 491 |
| 7 | 343, 67, 70, 491 |
| 49, 67, 10, 491 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 7 x 49 x 67 x 10 x 491 = 677020260
Therefore, the lowest common multiple of 686,402,420,982 is 677020260.
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 402 x 420 x 982 = 113739403680
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
402 : 1, 2, 3, 6, 67, 134, 201, 402
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
982 : 1, 2, 491, 982
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 686,402,420,982, is 2.
Now, the common factors can be found like this.
686:2x 7x 7x 7
402:2x 3x 67
420:2x 2x 3x 5x 7
982:2x 491
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 7 = 84
Therefore, the value for common factors is 84.
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 = 113739403680/(2x84)
LCM = 113739403680/168
LCM = 677020260
Thus, we can understand that the LCM of 686,402,420,982 is 677020260.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 686, 402, 420, 982
1. What is the LCM of 686, 402, 420, 982?
Answer: LCM of 686, 402, 420, 982 is 677020260.
2. How to calculate the LCM of 686, 402, 420, 982?
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, 402, 420, 982.
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}.