LCM of 978, 380, 628, 856, 390
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 978, 380, 628, 856, 390 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 978, 380, 628, 856, 390. So, keep reading to learn more.
Given numbers are 978,380,628,856,390
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 978,380,628,856,390 is 81161344680.
Find LCM of 978,380,628,856,390 with Prime Factorization
| 2 | 978, 380, 628, 856, 390 |
| 2 | 489, 190, 314, 428, 195 |
| 3 | 489, 95, 157, 214, 195 |
| 5 | 163, 95, 157, 214, 65 |
| 163, 19, 157, 214, 13 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 163 x 19 x 157 x 214 x 13 = 81161344680
Therefore, the lowest common multiple of 978,380,628,856,390 is 81161344680.
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.
978 x 380 x 628 x 856 x 390 = 77914890892800
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.
978 : 1, 2, 3, 6, 163, 326, 489, 978
380 : 1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380
628 : 1, 2, 4, 157, 314, 628
856 : 1, 2, 4, 8, 107, 214, 428, 856
390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 978,380,628,856,390, is 2.
Now, the common factors can be found like this.
978:2x 3x 163
380:2x 2x 5x 19
628:2x 2x 157
856:2x 2x 2x 107
390:2x 3x 5x 13
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 2x 2x 2x 3x 5 = 480
Therefore, the value for common factors is 480.
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 = 77914890892800/(2x480)
LCM = 77914890892800/960
LCM = 81161344680
Thus, we can understand that the LCM of 978,380,628,856,390 is 81161344680.
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FAQs on LCM of 978, 380, 628, 856, 390
1. What is the LCM of 978, 380, 628, 856, 390?
Answer: LCM of 978, 380, 628, 856, 390 is 81161344680.
2. How to calculate the LCM of 978, 380, 628, 856, 390?
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 978, 380, 628, 856, 390.
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}.