LCM of 689, 679, 693, 561
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 689, 679, 693, 561 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, 679, 693, 561. So, keep reading to learn more.
Given numbers are 689,679,693,561
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 689,679,693,561 is 787359573.
Find LCM of 689,679,693,561 with Prime Factorization
| 3 | 689, 679, 693, 561 |
| 7 | 689, 679, 231, 187 |
| 11 | 689, 97, 33, 187 |
| 689, 97, 3, 17 |
Multiply the prime numbers at the bottom and the left side.
3 x 7 x 11 x 689 x 97 x 3 x 17 = 787359573
Therefore, the lowest common multiple of 689,679,693,561 is 787359573.
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 679 x 693 x 561 = 181880061363
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
679 : 1, 7, 97, 679
693 : 1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 231, 693
561 : 1, 3, 11, 17, 33, 51, 187, 561
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 689,679,693,561, is 1.
Now, the common factors can be found like this.
689:13x 53
679:7x 97
693:3x 3x 7x 11
561:3x 11x 17
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 11 = 231
Therefore, the value for common factors is 231.
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 = 181880061363/(1x231)
LCM = 181880061363/231
LCM = 787359573
Thus, we can understand that the LCM of 689,679,693,561 is 787359573.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 689, 679, 693, 561
1. What is the LCM of 689, 679, 693, 561?
Answer: LCM of 689, 679, 693, 561 is 787359573.
2. How to calculate the LCM of 689, 679, 693, 561?
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, 679, 693, 561.
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}.