LCM of 979, 138, 990, 400
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 979, 138, 990, 400 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 979, 138, 990, 400. So, keep reading to learn more.
Given numbers are 979,138,990,400
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 979,138,990,400 is 81061200.
Find LCM of 979,138,990,400 with Prime Factorization
| 2 | 979, 138, 990, 400 |
| 3 | 979, 69, 495, 200 |
| 5 | 979, 23, 165, 200 |
| 11 | 979, 23, 33, 40 |
| 89, 23, 3, 40 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 11 x 89 x 23 x 3 x 40 = 81061200
Therefore, the lowest common multiple of 979,138,990,400 is 81061200.
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.
979 x 138 x 990 x 400 = 53500392000
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.
979 : 1, 11, 89, 979
138 : 1, 2, 3, 6, 23, 46, 69, 138
990 : 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
400 : 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 979,138,990,400, is 1.
Now, the common factors can be found like this.
979:11x 89
138:2x 3x 23
990:2x 3x 3x 5x 11
400:2x 2x 2x 2x 5x 5
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 3x 5x 11 = 660
Therefore, the value for common factors is 660.
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 = 53500392000/(1x660)
LCM = 53500392000/660
LCM = 81061200
Thus, we can understand that the LCM of 979,138,990,400 is 81061200.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 979, 138, 990, 400
1. What is the LCM of 979, 138, 990, 400?
Answer: LCM of 979, 138, 990, 400 is 81061200.
2. How to calculate the LCM of 979, 138, 990, 400?
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 979, 138, 990, 400.
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}.