LCM of 820, 791, 280, 109
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 820, 791, 280, 109 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 820, 791, 280, 109. So, keep reading to learn more.
Given numbers are 820,791,280,109
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 820,791,280,109 is 141399160.
Find LCM of 820,791,280,109 with Prime Factorization
| 2 | 820, 791, 280, 109 |
| 2 | 410, 791, 140, 109 |
| 5 | 205, 791, 70, 109 |
| 7 | 41, 791, 14, 109 |
| 41, 113, 2, 109 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 7 x 41 x 113 x 2 x 109 = 141399160
Therefore, the lowest common multiple of 820,791,280,109 is 141399160.
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.
820 x 791 x 280 x 109 = 19795882400
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.
820 : 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820
791 : 1, 7, 113, 791
280 : 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280
109 : 1, 109
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 820,791,280,109, is 1.
Now, the common factors can be found like this.
820:2x 2x 5x 41
791:7x 113
280:2x 2x 2x 5x 7
109:109
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 5x 7 = 140
Therefore, the value for common factors is 140.
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 = 19795882400/(1x140)
LCM = 19795882400/140
LCM = 141399160
Thus, we can understand that the LCM of 820,791,280,109 is 141399160.
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FAQs on LCM of 820, 791, 280, 109
1. What is the LCM of 820, 791, 280, 109?
Answer: LCM of 820, 791, 280, 109 is 141399160.
2. How to calculate the LCM of 820, 791, 280, 109?
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 820, 791, 280, 109.
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}.