LCM of 400, 688, 689, 981, 781
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 400, 688, 689, 981, 781 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 400, 688, 689, 981, 781. So, keep reading to learn more.
Given numbers are 400,688,689,981,781
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 400,688,689,981,781 is 9079620778800.
Find LCM of 400,688,689,981,781 with Prime Factorization
| 2 | 400, 688, 689, 981, 781 |
| 2 | 200, 344, 689, 981, 781 |
| 2 | 100, 172, 689, 981, 781 |
| 2 | 50, 86, 689, 981, 781 |
| 25, 43, 689, 981, 781 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 25 x 43 x 689 x 981 x 781 = 9079620778800
Therefore, the lowest common multiple of 400,688,689,981,781 is 9079620778800.
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.
400 x 688 x 689 x 981 x 781 = 145273932460800
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.
400 : 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400
688 : 1, 2, 4, 8, 16, 43, 86, 172, 344, 688
689 : 1, 13, 53, 689
981 : 1, 3, 9, 109, 327, 981
781 : 1, 11, 71, 781
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 400,688,689,981,781, is 1.
Now, the common factors can be found like this.
400:2x 2x 2x 2x 5x 5
688:2x 2x 2x 2x 43
689:13x 53
981:3x 3x 109
781:11x 71
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 2 = 16
Therefore, the value for common factors is 16.
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 = 145273932460800/(1x16)
LCM = 145273932460800/16
LCM = 9079620778800
Thus, we can understand that the LCM of 400,688,689,981,781 is 9079620778800.
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FAQs on LCM of 400, 688, 689, 981, 781
1. What is the LCM of 400, 688, 689, 981, 781?
Answer: LCM of 400, 688, 689, 981, 781 is 9079620778800.
2. How to calculate the LCM of 400, 688, 689, 981, 781?
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 400, 688, 689, 981, 781.
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}.