LCM of 661, 390, 981, 981
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 661, 390, 981, 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 661, 390, 981, 981. So, keep reading to learn more.
Given numbers are 661,390,981,981
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 661,390,981,981 is 84297330.
Find LCM of 661,390,981,981 with Prime Factorization
| 3 | 661, 390, 981, 981 |
| 3 | 661, 130, 327, 327 |
| 109 | 661, 130, 109, 109 |
| 661, 130, 1, 1 |
Multiply the prime numbers at the bottom and the left side.
3 x 3 x 109 x 661 x 130 x 1 x 1 = 84297330
Therefore, the lowest common multiple of 661,390,981,981 is 84297330.
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.
661 x 390 x 981 x 981 = 248087042190
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.
661 : 1, 661
390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
981 : 1, 3, 9, 109, 327, 981
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 661,390,981,981, is 1.
Now, the common factors can be found like this.
661:661
390:2x 3x 5x 13
981:3x 3x 109
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 109 = 2943
Therefore, the value for common factors is 2943.
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 = 248087042190/(1x2943)
LCM = 248087042190/2943
LCM = 84297330
Thus, we can understand that the LCM of 661,390,981,981 is 84297330.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 661, 390, 981, 981
1. What is the LCM of 661, 390, 981, 981?
Answer: LCM of 661, 390, 981, 981 is 84297330.
2. How to calculate the LCM of 661, 390, 981, 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 661, 390, 981, 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}.