LCM of 981, 385, 331, 420, 689
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 981, 385, 331, 420, 689 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 981, 385, 331, 420, 689. So, keep reading to learn more.
Given numbers are 981,385,331,420,689
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 981,385,331,420,689 is 344537853660.
Find LCM of 981,385,331,420,689 with Prime Factorization
| 3 | 981, 385, 331, 420, 689 |
| 5 | 327, 385, 331, 140, 689 |
| 7 | 327, 77, 331, 28, 689 |
| 327, 11, 331, 4, 689 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 7 x 327 x 11 x 331 x 4 x 689 = 344537853660
Therefore, the lowest common multiple of 981,385,331,420,689 is 344537853660.
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.
981 x 385 x 331 x 420 x 689 = 36176474634300
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.
981 : 1, 3, 9, 109, 327, 981
385 : 1, 5, 7, 11, 35, 55, 77, 385
331 : 1, 331
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
689 : 1, 13, 53, 689
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 981,385,331,420,689, is 1.
Now, the common factors can be found like this.
981:3x 3x 109
385:5x 7x 11
331:331
420:2x 2x 3x 5x 7
689:13x 53
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 5x 7 = 105
Therefore, the value for common factors is 105.
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 = 36176474634300/(1x105)
LCM = 36176474634300/105
LCM = 344537853660
Thus, we can understand that the LCM of 981,385,331,420,689 is 344537853660.
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FAQs on LCM of 981, 385, 331, 420, 689
1. What is the LCM of 981, 385, 331, 420, 689?
Answer: LCM of 981, 385, 331, 420, 689 is 344537853660.
2. How to calculate the LCM of 981, 385, 331, 420, 689?
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 981, 385, 331, 420, 689.
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}.