LCM of 108, 978, 816, 690
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 108, 978, 816, 690 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 108, 978, 816, 690. So, keep reading to learn more.
Given numbers are 108,978,816,690
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 108,978,816,690 is 137663280.
Find LCM of 108,978,816,690 with Prime Factorization
| 2 | 108, 978, 816, 690 |
| 2 | 54, 489, 408, 345 |
| 3 | 27, 489, 204, 345 |
| 9, 163, 68, 115 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 9 x 163 x 68 x 115 = 137663280
Therefore, the lowest common multiple of 108,978,816,690 is 137663280.
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.
108 x 978 x 816 x 690 = 59470536960
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.
108 : 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108
978 : 1, 2, 3, 6, 163, 326, 489, 978
816 : 1, 2, 3, 4, 6, 8, 12, 16, 17, 24, 34, 48, 51, 68, 102, 136, 204, 272, 408, 816
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
6 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 108,978,816,690, is 6.
Now, the common factors can be found like this.
108:2x 2x 3x 3x 3
978:2x 3x 163
816:2x 2x 2x 2x 3x 17
690:2x 3x 5x 23
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 3x 3 = 72
Therefore, the value for common factors is 72.
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 = 59470536960/(6x72)
LCM = 59470536960/432
LCM = 137663280
Thus, we can understand that the LCM of 108,978,816,690 is 137663280.
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FAQs on LCM of 108, 978, 816, 690
1. What is the LCM of 108, 978, 816, 690?
Answer: LCM of 108, 978, 816, 690 is 137663280.
2. How to calculate the LCM of 108, 978, 816, 690?
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 108, 978, 816, 690.
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}.