LCM of 689, 721, 945, 189
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 689, 721, 945, 189 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 689, 721, 945, 189. So, keep reading to learn more.
Given numbers are 689,721,945,189
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 689,721,945,189 is 67063815.
Find LCM of 689,721,945,189 with Prime Factorization
| 3 | 689, 721, 945, 189 |
| 3 | 689, 721, 315, 63 |
| 3 | 689, 721, 105, 21 |
| 7 | 689, 721, 35, 7 |
| 689, 103, 5, 1 |
Multiply the prime numbers at the bottom and the left side.
3 x 3 x 3 x 7 x 689 x 103 x 5 x 1 = 67063815
Therefore, the lowest common multiple of 689,721,945,189 is 67063815.
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.
689 x 721 x 945 x 189 = 88725427245
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.
689 : 1, 13, 53, 689
721 : 1, 7, 103, 721
945 : 1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945
189 : 1, 3, 7, 9, 21, 27, 63, 189
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 689,721,945,189, is 1.
Now, the common factors can be found like this.
689:13x 53
721:7x 103
945:3x 3x 3x 5x 7
189:3x 3x 3x 7
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 3x 7x 7 = 1323
Therefore, the value for common factors is 1323.
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 = 88725427245/(1x1323)
LCM = 88725427245/1323
LCM = 67063815
Thus, we can understand that the LCM of 689,721,945,189 is 67063815.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 689, 721, 945, 189
1. What is the LCM of 689, 721, 945, 189?
Answer: LCM of 689, 721, 945, 189 is 67063815.
2. How to calculate the LCM of 689, 721, 945, 189?
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 689, 721, 945, 189.
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}.