LCM of 721, 261, 990, 402
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 721, 261, 990, 402 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 721, 261, 990, 402. So, keep reading to learn more.
Given numbers are 721,261,990,402
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 721,261,990,402 is 1386893970.
Find LCM of 721,261,990,402 with Prime Factorization
| 2 | 721, 261, 990, 402 |
| 3 | 721, 261, 495, 201 |
| 3 | 721, 87, 165, 67 |
| 721, 29, 55, 67 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 721 x 29 x 55 x 67 = 1386893970
Therefore, the lowest common multiple of 721,261,990,402 is 1386893970.
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.
721 x 261 x 990 x 402 = 74892274380
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.
721 : 1, 7, 103, 721
261 : 1, 3, 9, 29, 87, 261
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
402 : 1, 2, 3, 6, 67, 134, 201, 402
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 721,261,990,402, is 1.
Now, the common factors can be found like this.
721:7x 103
261:3x 3x 29
990:2x 3x 3x 5x 11
402:2x 3x 67
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 3x 3 = 54
Therefore, the value for common factors is 54.
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 = 74892274380/(1x54)
LCM = 74892274380/54
LCM = 1386893970
Thus, we can understand that the LCM of 721,261,990,402 is 1386893970.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 721, 261, 990, 402
1. What is the LCM of 721, 261, 990, 402?
Answer: LCM of 721, 261, 990, 402 is 1386893970.
2. How to calculate the LCM of 721, 261, 990, 402?
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 721, 261, 990, 402.
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}.