LCM of 981, 981, 638, 805
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 981, 981, 638, 805 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 981, 981, 638, 805. So, keep reading to learn more.
Given numbers are 981,981,638,805
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 981,981,638,805 is 503831790.
Find LCM of 981,981,638,805 with Prime Factorization
| 3 | 981, 981, 638, 805 |
| 3 | 327, 327, 638, 805 |
| 109 | 109, 109, 638, 805 |
| 1, 1, 638, 805 |
Multiply the prime numbers at the bottom and the left side.
3 x 3 x 109 x 1 x 1 x 638 x 805 = 503831790
Therefore, the lowest common multiple of 981,981,638,805 is 503831790.
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.
981 x 981 x 638 x 805 = 494258985990
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.
981 : 1, 3, 9, 109, 327, 981
981 : 1, 3, 9, 109, 327, 981
638 : 1, 2, 11, 22, 29, 58, 319, 638
805 : 1, 5, 7, 23, 35, 115, 161, 805
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 981,981,638,805, is 1.
Now, the common factors can be found like this.
981:3x 3x 109
981:3x 3x 109
638:2x 11x 29
805:5x 7x 23
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 109 = 981
Therefore, the value for common factors is 981.
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 = 494258985990/(1x981)
LCM = 494258985990/981
LCM = 503831790
Thus, we can understand that the LCM of 981,981,638,805 is 503831790.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 981, 981, 638, 805
1. What is the LCM of 981, 981, 638, 805?
Answer: LCM of 981, 981, 638, 805 is 503831790.
2. How to calculate the LCM of 981, 981, 638, 805?
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 981, 981, 638, 805.
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}.