LCM of 871, 989, 763, 840
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 871, 989, 763, 840 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 871, 989, 763, 840. So, keep reading to learn more.
Given numbers are 871,989,763,840
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 871,989,763,840 is 78871523640.
Find LCM of 871,989,763,840 with Prime Factorization
| 7 | 871, 989, 763, 840 |
| 871, 989, 109, 120 |
Multiply the prime numbers at the bottom and the left side.
7 x 871 x 989 x 109 x 120 = 78871523640
Therefore, the lowest common multiple of 871,989,763,840 is 78871523640.
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.
871 x 989 x 763 x 840 = 552100665480
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.
871 : 1, 13, 67, 871
989 : 1, 23, 43, 989
763 : 1, 7, 109, 763
840 : 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 871,989,763,840, is 1.
Now, the common factors can be found like this.
871:13x 67
989:23x 43
763:7x 109
840:2x 2x 2x 3x 5x 7
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
7 = 7
Therefore, the value for common factors is 7.
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 = 552100665480/(1x7)
LCM = 552100665480/7
LCM = 78871523640
Thus, we can understand that the LCM of 871,989,763,840 is 78871523640.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 871, 989, 763, 840
1. What is the LCM of 871, 989, 763, 840?
Answer: LCM of 871, 989, 763, 840 is 78871523640.
2. How to calculate the LCM of 871, 989, 763, 840?
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 871, 989, 763, 840.
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}.