LCM of 621, 815, 688, 978
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 621, 815, 688, 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 621, 815, 688, 978. So, keep reading to learn more.
Given numbers are 621,815,688,978
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 621,815,688,978 is 348207120.
Find LCM of 621,815,688,978 with Prime Factorization
| 2 | 621, 815, 688, 978 |
| 3 | 621, 815, 344, 489 |
| 163 | 207, 815, 344, 163 |
| 207, 5, 344, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 163 x 207 x 5 x 344 x 1 = 348207120
Therefore, the lowest common multiple of 621,815,688,978 is 348207120.
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.
621 x 815 x 688 x 978 = 340546563360
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.
621 : 1, 3, 9, 23, 27, 69, 207, 621
815 : 1, 5, 163, 815
688 : 1, 2, 4, 8, 16, 43, 86, 172, 344, 688
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 621,815,688,978, is 1.
Now, the common factors can be found like this.
621:3x 3x 3x 23
815:5x 163
688:2x 2x 2x 2x 43
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 163 = 978
Therefore, the value for common factors is 978.
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 = 340546563360/(1x978)
LCM = 340546563360/978
LCM = 348207120
Thus, we can understand that the LCM of 621,815,688,978 is 348207120.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 621, 815, 688, 978
1. What is the LCM of 621, 815, 688, 978?
Answer: LCM of 621, 815, 688, 978 is 348207120.
2. How to calculate the LCM of 621, 815, 688, 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 621, 815, 688, 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}.