LCM of 138, 649, 649, 820
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 138, 649, 649, 820 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 138, 649, 649, 820. So, keep reading to learn more.
Given numbers are 138,649,649,820
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 138,649,649,820 is 36720420.
Find LCM of 138,649,649,820 with Prime Factorization
| 2 | 138, 649, 649, 820 |
| 11 | 69, 649, 649, 410 |
| 59 | 69, 59, 59, 410 |
| 69, 1, 1, 410 |
Multiply the prime numbers at the bottom and the left side.
2 x 11 x 59 x 69 x 1 x 1 x 410 = 36720420
Therefore, the lowest common multiple of 138,649,649,820 is 36720420.
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.
138 x 649 x 649 x 820 = 47663105160
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.
138 : 1, 2, 3, 6, 23, 46, 69, 138
649 : 1, 11, 59, 649
649 : 1, 11, 59, 649
820 : 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 138,649,649,820, is 1.
Now, the common factors can be found like this.
138:2x 3x 23
649:11x 59
649:11x 59
820:2x 2x 5x 41
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 11x 59 = 1298
Therefore, the value for common factors is 1298.
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 = 47663105160/(1x1298)
LCM = 47663105160/1298
LCM = 36720420
Thus, we can understand that the LCM of 138,649,649,820 is 36720420.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 138, 649, 649, 820
1. What is the LCM of 138, 649, 649, 820?
Answer: LCM of 138, 649, 649, 820 is 36720420.
2. How to calculate the LCM of 138, 649, 649, 820?
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 138, 649, 649, 820.
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}.