LCM of 172, 191, 756, 721
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 172, 191, 756, 721 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 172, 191, 756, 721. So, keep reading to learn more.
Given numbers are 172,191,756,721
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 172,191,756,721 is 639529884.
Find LCM of 172,191,756,721 with Prime Factorization
| 2 | 172, 191, 756, 721 |
| 2 | 86, 191, 378, 721 |
| 7 | 43, 191, 189, 721 |
| 43, 191, 27, 103 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 7 x 43 x 191 x 27 x 103 = 639529884
Therefore, the lowest common multiple of 172,191,756,721 is 639529884.
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.
172 x 191 x 756 x 721 = 17906836752
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.
172 : 1, 2, 4, 43, 86, 172
191 : 1, 191
756 : 1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 63, 84, 108, 126, 189, 252, 378, 756
721 : 1, 7, 103, 721
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 172,191,756,721, is 1.
Now, the common factors can be found like this.
172:2x 2x 43
191:191
756:2x 2x 3x 3x 3x 7
721:7x 103
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 7 = 28
Therefore, the value for common factors is 28.
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 = 17906836752/(1x28)
LCM = 17906836752/28
LCM = 639529884
Thus, we can understand that the LCM of 172,191,756,721 is 639529884.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 172, 191, 756, 721
1. What is the LCM of 172, 191, 756, 721?
Answer: LCM of 172, 191, 756, 721 is 639529884.
2. How to calculate the LCM of 172, 191, 756, 721?
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 172, 191, 756, 721.
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}.