LCM of 991, 817, 690, 860
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 991, 817, 690, 860 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 991, 817, 690, 860. So, keep reading to learn more.
Given numbers are 991,817,690,860
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 991,817,690,860 is 1117312860.
Find LCM of 991,817,690,860 with Prime Factorization
| 2 | 991, 817, 690, 860 |
| 5 | 991, 817, 345, 430 |
| 43 | 991, 817, 69, 86 |
| 991, 19, 69, 2 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 43 x 991 x 19 x 69 x 2 = 1117312860
Therefore, the lowest common multiple of 991,817,690,860 is 1117312860.
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.
991 x 817 x 690 x 860 = 480444529800
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.
991 : 1, 991
817 : 1, 19, 43, 817
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
860 : 1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 991,817,690,860, is 1.
Now, the common factors can be found like this.
991:991
817:19x 43
690:2x 3x 5x 23
860:2x 2x 5x 43
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 43 = 430
Therefore, the value for common factors is 430.
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 = 480444529800/(1x430)
LCM = 480444529800/430
LCM = 1117312860
Thus, we can understand that the LCM of 991,817,690,860 is 1117312860.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 991, 817, 690, 860
1. What is the LCM of 991, 817, 690, 860?
Answer: LCM of 991, 817, 690, 860 is 1117312860.
2. How to calculate the LCM of 991, 817, 690, 860?
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 991, 817, 690, 860.
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}.