LCM of 856, 680, 986, 905
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 856, 680, 986, 905 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 856, 680, 986, 905. So, keep reading to learn more.
Given numbers are 856,680,986,905
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 856,680,986,905 is 381917240.
Find LCM of 856,680,986,905 with Prime Factorization
| 2 | 856, 680, 986, 905 |
| 2 | 428, 340, 493, 905 |
| 2 | 214, 170, 493, 905 |
| 5 | 107, 85, 493, 905 |
| 17 | 107, 17, 493, 181 |
| 107, 1, 29, 181 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 5 x 17 x 107 x 1 x 29 x 181 = 381917240
Therefore, the lowest common multiple of 856,680,986,905 is 381917240.
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.
856 x 680 x 986 x 905 = 519407446400
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.
856 : 1, 2, 4, 8, 107, 214, 428, 856
680 : 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680
986 : 1, 2, 17, 29, 34, 58, 493, 986
905 : 1, 5, 181, 905
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 856,680,986,905, is 1.
Now, the common factors can be found like this.
856:2x 2x 2x 107
680:2x 2x 2x 5x 17
986:2x 17x 29
905:5x 181
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 2x 5x 17 = 1360
Therefore, the value for common factors is 1360.
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 = 519407446400/(1x1360)
LCM = 519407446400/1360
LCM = 381917240
Thus, we can understand that the LCM of 856,680,986,905 is 381917240.
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FAQs on LCM of 856, 680, 986, 905
1. What is the LCM of 856, 680, 986, 905?
Answer: LCM of 856, 680, 986, 905 is 381917240.
2. How to calculate the LCM of 856, 680, 986, 905?
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 856, 680, 986, 905.
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}.