LCM of 805, 686, 245, 981
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 805, 686, 245, 981 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 805, 686, 245, 981. So, keep reading to learn more.
Given numbers are 805,686,245,981
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 805,686,245,981 is 77391090.
Find LCM of 805,686,245,981 with Prime Factorization
| 5 | 805, 686, 245, 981 |
| 7 | 161, 686, 49, 981 |
| 7 | 23, 98, 7, 981 |
| 23, 14, 1, 981 |
Multiply the prime numbers at the bottom and the left side.
5 x 7 x 7 x 23 x 14 x 1 x 981 = 77391090
Therefore, the lowest common multiple of 805,686,245,981 is 77391090.
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.
805 x 686 x 245 x 981 = 132725719350
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.
805 : 1, 5, 7, 23, 35, 115, 161, 805
686 : 1, 2, 7, 14, 49, 98, 343, 686
245 : 1, 5, 7, 35, 49, 245
981 : 1, 3, 9, 109, 327, 981
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 805,686,245,981, is 1.
Now, the common factors can be found like this.
805:5x 7x 23
686:2x 7x 7x 7
245:5x 7x 7
981:3x 3x 109
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
5x 7x 7x 7 = 1715
Therefore, the value for common factors is 1715.
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 = 132725719350/(1x1715)
LCM = 132725719350/1715
LCM = 77391090
Thus, we can understand that the LCM of 805,686,245,981 is 77391090.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 805, 686, 245, 981
1. What is the LCM of 805, 686, 245, 981?
Answer: LCM of 805, 686, 245, 981 is 77391090.
2. How to calculate the LCM of 805, 686, 245, 981?
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 805, 686, 245, 981.
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}.