LCM of 981, 861, 392, 905, 981
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 981, 861, 392, 905, 981 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, 861, 392, 905, 981. So, keep reading to learn more.
Given numbers are 981,861,392,905,981
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 981,861,392,905,981 is 14268801960.
Find LCM of 981,861,392,905,981 with Prime Factorization
| 3 | 981, 861, 392, 905, 981 |
| 3 | 327, 287, 392, 905, 327 |
| 7 | 109, 287, 392, 905, 109 |
| 109 | 109, 41, 56, 905, 109 |
| 1, 41, 56, 905, 1 |
Multiply the prime numbers at the bottom and the left side.
3 x 3 x 7 x 109 x 1 x 41 x 56 x 905 x 1 = 14268801960
Therefore, the lowest common multiple of 981,861,392,905,981 is 14268801960.
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 861 x 392 x 905 x 981 = 293951589177960
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
861 : 1, 3, 7, 21, 41, 123, 287, 861
392 : 1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392
905 : 1, 5, 181, 905
981 : 1, 3, 9, 109, 327, 981
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 981,861,392,905,981, is 1.
Now, the common factors can be found like this.
981:3x 3x 109
861:3x 7x 41
392:2x 2x 2x 7x 7
905:5x 181
981:3x 3x 109
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 3x 7x 109 = 20601
Therefore, the value for common factors is 20601.
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 = 293951589177960/(1x20601)
LCM = 293951589177960/20601
LCM = 14268801960
Thus, we can understand that the LCM of 981,861,392,905,981 is 14268801960.
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FAQs on LCM of 981, 861, 392, 905, 981
1. What is the LCM of 981, 861, 392, 905, 981?
Answer: LCM of 981, 861, 392, 905, 981 is 14268801960.
2. How to calculate the LCM of 981, 861, 392, 905, 981?
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, 861, 392, 905, 981.
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}.