LCM of 724, 721, 105, 638
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 724, 721, 105, 638 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 724, 721, 105, 638. So, keep reading to learn more.
Given numbers are 724,721,105,638
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 724,721,105,638 is 2497789140.
Find LCM of 724,721,105,638 with Prime Factorization
| 2 | 724, 721, 105, 638 |
| 7 | 362, 721, 105, 319 |
| 362, 103, 15, 319 |
Multiply the prime numbers at the bottom and the left side.
2 x 7 x 362 x 103 x 15 x 319 = 2497789140
Therefore, the lowest common multiple of 724,721,105,638 is 2497789140.
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.
724 x 721 x 105 x 638 = 34969047960
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.
724 : 1, 2, 4, 181, 362, 724
721 : 1, 7, 103, 721
105 : 1, 3, 5, 7, 15, 21, 35, 105
638 : 1, 2, 11, 22, 29, 58, 319, 638
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 724,721,105,638, is 1.
Now, the common factors can be found like this.
724:2x 2x 181
721:7x 103
105:3x 5x 7
638:2x 11x 29
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 7 = 14
Therefore, the value for common factors is 14.
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 = 34969047960/(1x14)
LCM = 34969047960/14
LCM = 2497789140
Thus, we can understand that the LCM of 724,721,105,638 is 2497789140.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 724, 721, 105, 638
1. What is the LCM of 724, 721, 105, 638?
Answer: LCM of 724, 721, 105, 638 is 2497789140.
2. How to calculate the LCM of 724, 721, 105, 638?
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 724, 721, 105, 638.
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}.