LCM of 808, 656, 820, 642
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 808, 656, 820, 642 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 808, 656, 820, 642. So, keep reading to learn more.
Given numbers are 808,656,820,642
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 808,656,820,642 is 106340880.
Find LCM of 808,656,820,642 with Prime Factorization
| 2 | 808, 656, 820, 642 |
| 2 | 404, 328, 410, 321 |
| 2 | 202, 164, 205, 321 |
| 41 | 101, 82, 205, 321 |
| 101, 2, 5, 321 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 41 x 101 x 2 x 5 x 321 = 106340880
Therefore, the lowest common multiple of 808,656,820,642 is 106340880.
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.
808 x 656 x 820 x 642 = 279038469120
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.
808 : 1, 2, 4, 8, 101, 202, 404, 808
656 : 1, 2, 4, 8, 16, 41, 82, 164, 328, 656
820 : 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820
642 : 1, 2, 3, 6, 107, 214, 321, 642
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 808,656,820,642, is 2.
Now, the common factors can be found like this.
808:2x 2x 2x 101
656:2x 2x 2x 2x 41
820:2x 2x 5x 41
642:2x 3x 107
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 2x 2x 41 = 1312
Therefore, the value for common factors is 1312.
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 = 279038469120/(2x1312)
LCM = 279038469120/2624
LCM = 106340880
Thus, we can understand that the LCM of 808,656,820,642 is 106340880.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 808, 656, 820, 642
1. What is the LCM of 808, 656, 820, 642?
Answer: LCM of 808, 656, 820, 642 is 106340880.
2. How to calculate the LCM of 808, 656, 820, 642?
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 808, 656, 820, 642.
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}.