LCM of 721, 771, 665, 399
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 721, 771, 665, 399 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, 771, 665, 399. So, keep reading to learn more.
Given numbers are 721,771,665,399
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 721,771,665,399 is 52809645.
Find LCM of 721,771,665,399 with Prime Factorization
| 3 | 721, 771, 665, 399 |
| 7 | 721, 257, 665, 133 |
| 19 | 103, 257, 95, 19 |
| 103, 257, 5, 1 |
Multiply the prime numbers at the bottom and the left side.
3 x 7 x 19 x 103 x 257 x 5 x 1 = 52809645
Therefore, the lowest common multiple of 721,771,665,399 is 52809645.
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 771 x 665 x 399 = 147497338485
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
771 : 1, 3, 257, 771
665 : 1, 5, 7, 19, 35, 95, 133, 665
399 : 1, 3, 7, 19, 21, 57, 133, 399
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 721,771,665,399, is 1.
Now, the common factors can be found like this.
721:7x 103
771:3x 257
665:5x 7x 19
399:3x 7x 19
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 7x 7x 19 = 2793
Therefore, the value for common factors is 2793.
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 = 147497338485/(1x2793)
LCM = 147497338485/2793
LCM = 52809645
Thus, we can understand that the LCM of 721,771,665,399 is 52809645.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 721, 771, 665, 399
1. What is the LCM of 721, 771, 665, 399?
Answer: LCM of 721, 771, 665, 399 is 52809645.
2. How to calculate the LCM of 721, 771, 665, 399?
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, 771, 665, 399.
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}.