LCM of 261, 638, 978, 388
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 261, 638, 978, 388 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, 638, 978, 388. So, keep reading to learn more.
Given numbers are 261,638,978,388
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 261,638,978,388 is 181573524.
Find LCM of 261,638,978,388 with Prime Factorization
| 2 | 261, 638, 978, 388 |
| 3 | 261, 319, 489, 194 |
| 29 | 87, 319, 163, 194 |
| 3, 11, 163, 194 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 29 x 3 x 11 x 163 x 194 = 181573524
Therefore, the lowest common multiple of 261,638,978,388 is 181573524.
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 638 x 978 x 388 = 63187586352
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
638 : 1, 2, 11, 22, 29, 58, 319, 638
978 : 1, 2, 3, 6, 163, 326, 489, 978
388 : 1, 2, 4, 97, 194, 388
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 261,638,978,388, is 1.
Now, the common factors can be found like this.
261:3x 3x 29
638:2x 11x 29
978:2x 3x 163
388:2x 2x 97
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 3x 29 = 348
Therefore, the value for common factors is 348.
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 = 63187586352/(1x348)
LCM = 63187586352/348
LCM = 181573524
Thus, we can understand that the LCM of 261,638,978,388 is 181573524.
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FAQs on LCM of 261, 638, 978, 388
1. What is the LCM of 261, 638, 978, 388?
Answer: LCM of 261, 638, 978, 388 is 181573524.
2. How to calculate the LCM of 261, 638, 978, 388?
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, 638, 978, 388.
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}.