LCM of 782, 689, 390, 640, 381
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 782, 689, 390, 640, 381 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 782, 689, 390, 640, 381. So, keep reading to learn more.
Given numbers are 782,689,390,640,381
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 782,689,390,640,381 is 65690252160.
Find LCM of 782,689,390,640,381 with Prime Factorization
| 2 | 782, 689, 390, 640, 381 |
| 3 | 391, 689, 195, 320, 381 |
| 5 | 391, 689, 65, 320, 127 |
| 13 | 391, 689, 13, 64, 127 |
| 391, 53, 1, 64, 127 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 13 x 391 x 53 x 1 x 64 x 127 = 65690252160
Therefore, the lowest common multiple of 782,689,390,640,381 is 65690252160.
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.
782 x 689 x 390 x 640 x 381 = 51238396684800
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.
782 : 1, 2, 17, 23, 34, 46, 391, 782
689 : 1, 13, 53, 689
390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
381 : 1, 3, 127, 381
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 782,689,390,640,381, is 1.
Now, the common factors can be found like this.
782:2x 17x 23
689:13x 53
390:2x 3x 5x 13
640:2x 2x 2x 2x 2x 2x 2x 5
381:3x 127
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 5x 13 = 780
Therefore, the value for common factors is 780.
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 = 51238396684800/(1x780)
LCM = 51238396684800/780
LCM = 65690252160
Thus, we can understand that the LCM of 782,689,390,640,381 is 65690252160.
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FAQs on LCM of 782, 689, 390, 640, 381
1. What is the LCM of 782, 689, 390, 640, 381?
Answer: LCM of 782, 689, 390, 640, 381 is 65690252160.
2. How to calculate the LCM of 782, 689, 390, 640, 381?
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 782, 689, 390, 640, 381.
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}.