LCM of 721, 391, 221, 437
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 721, 391, 221, 437 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, 391, 221, 437. So, keep reading to learn more.
Given numbers are 721,391,221,437
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 721,391,221,437 is 69632017.
Find LCM of 721,391,221,437 with Prime Factorization
| 17 | 721, 391, 221, 437 |
| 23 | 721, 23, 13, 437 |
| 721, 1, 13, 19 |
Multiply the prime numbers at the bottom and the left side.
17 x 23 x 721 x 1 x 13 x 19 = 69632017
Therefore, the lowest common multiple of 721,391,221,437 is 69632017.
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 391 x 221 x 437 = 27226118647
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
391 : 1, 17, 23, 391
221 : 1, 13, 17, 221
437 : 1, 19, 23, 437
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 721,391,221,437, is 1.
Now, the common factors can be found like this.
721:7x 103
391:17x 23
221:13x 17
437:19x 23
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
17x 23 = 391
Therefore, the value for common factors is 391.
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 = 27226118647/(1x391)
LCM = 27226118647/391
LCM = 69632017
Thus, we can understand that the LCM of 721,391,221,437 is 69632017.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 721, 391, 221, 437
1. What is the LCM of 721, 391, 221, 437?
Answer: LCM of 721, 391, 221, 437 is 69632017.
2. How to calculate the LCM of 721, 391, 221, 437?
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, 391, 221, 437.
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}.