LCM of 261, 990, 121, 978
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 261, 990, 121, 978 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 261, 990, 121, 978. So, keep reading to learn more.
Given numbers are 261,990,121,978
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 261,990,121,978 is 51477030.
Find LCM of 261,990,121,978 with Prime Factorization
| 2 | 261, 990, 121, 978 |
| 3 | 261, 495, 121, 489 |
| 3 | 87, 165, 121, 163 |
| 11 | 29, 55, 121, 163 |
| 29, 5, 11, 163 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 11 x 29 x 5 x 11 x 163 = 51477030
Therefore, the lowest common multiple of 261,990,121,978 is 51477030.
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.
261 x 990 x 121 x 978 = 30577355820
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.
261 : 1, 3, 9, 29, 87, 261
990 : 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
121 : 1, 11, 121
978 : 1, 2, 3, 6, 163, 326, 489, 978
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 261,990,121,978, is 1.
Now, the common factors can be found like this.
261:3x 3x 29
990:2x 3x 3x 5x 11
121:11x 11
978:2x 3x 163
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 3x 3x 11 = 594
Therefore, the value for common factors is 594.
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 = 30577355820/(1x594)
LCM = 30577355820/594
LCM = 51477030
Thus, we can understand that the LCM of 261,990,121,978 is 51477030.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 261, 990, 121, 978
1. What is the LCM of 261, 990, 121, 978?
Answer: LCM of 261, 990, 121, 978 is 51477030.
2. How to calculate the LCM of 261, 990, 121, 978?
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 261, 990, 121, 978.
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}.