LCM of 7, 988, 520, 991
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 7, 988, 520, 991 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 7, 988, 520, 991. So, keep reading to learn more.
Given numbers are 7,988,520,991
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 7,988,520,991 is 68537560.
Find LCM of 7,988,520,991 with Prime Factorization
| 2 | 7, 988, 520, 991 |
| 2 | 7, 494, 260, 991 |
| 13 | 7, 247, 130, 991 |
| 7, 19, 10, 991 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 13 x 7 x 19 x 10 x 991 = 68537560
Therefore, the lowest common multiple of 7,988,520,991 is 68537560.
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.
7 x 988 x 520 x 991 = 3563953120
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.
7 : 1, 7
988 : 1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 988
520 : 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520
991 : 1, 991
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 7,988,520,991, is 1.
Now, the common factors can be found like this.
7:7
988:2x 2x 13x 19
520:2x 2x 2x 5x 13
991:991
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 13 = 52
Therefore, the value for common factors is 52.
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 = 3563953120/(1x52)
LCM = 3563953120/52
LCM = 68537560
Thus, we can understand that the LCM of 7,988,520,991 is 68537560.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 7, 988, 520, 991
1. What is the LCM of 7, 988, 520, 991?
Answer: LCM of 7, 988, 520, 991 is 68537560.
2. How to calculate the LCM of 7, 988, 520, 991?
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 7, 988, 520, 991.
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}.