LCM of 387, 786, 360, 690
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 387, 786, 360, 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 387, 786, 360, 690. So, keep reading to learn more.
Given numbers are 387,786,360,690
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 387,786,360,690 is 46641240.
Find LCM of 387,786,360,690 with Prime Factorization
| 2 | 387, 786, 360, 690 |
| 3 | 387, 393, 180, 345 |
| 3 | 129, 131, 60, 115 |
| 5 | 43, 131, 20, 115 |
| 43, 131, 4, 23 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 5 x 43 x 131 x 4 x 23 = 46641240
Therefore, the lowest common multiple of 387,786,360,690 is 46641240.
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.
387 x 786 x 360 x 690 = 75558808800
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.
387 : 1, 3, 9, 43, 129, 387
786 : 1, 2, 3, 6, 131, 262, 393, 786
360 : 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
3 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 387,786,360,690, is 3.
Now, the common factors can be found like this.
387:3x 3x 43
786:2x 3x 131
360:2x 2x 2x 3x 3x 5
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 3x 3x 3x 5 = 540
Therefore, the value for common factors is 540.
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 = 75558808800/(3x540)
LCM = 75558808800/1620
LCM = 46641240
Thus, we can understand that the LCM of 387,786,360,690 is 46641240.
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FAQs on LCM of 387, 786, 360, 690
1. What is the LCM of 387, 786, 360, 690?
Answer: LCM of 387, 786, 360, 690 is 46641240.
2. How to calculate the LCM of 387, 786, 360, 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 387, 786, 360, 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}.