LCM of 813, 961, 420, 945
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 813, 961, 420, 945 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 813, 961, 420, 945. So, keep reading to learn more.
Given numbers are 813,961,420,945
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 813,961,420,945 is 984429180.
Find LCM of 813,961,420,945 with Prime Factorization
| 3 | 813, 961, 420, 945 |
| 5 | 271, 961, 140, 315 |
| 7 | 271, 961, 28, 63 |
| 271, 961, 4, 9 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 7 x 271 x 961 x 4 x 9 = 984429180
Therefore, the lowest common multiple of 813,961,420,945 is 984429180.
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.
813 x 961 x 420 x 945 = 310095191700
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.
813 : 1, 3, 271, 813
961 : 1, 31, 961
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
945 : 1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 813,961,420,945, is 1.
Now, the common factors can be found like this.
813:3x 271
961:31x 31
420:2x 2x 3x 5x 7
945:3x 3x 3x 5x 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 5x 7 = 315
Therefore, the value for common factors is 315.
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 = 310095191700/(1x315)
LCM = 310095191700/315
LCM = 984429180
Thus, we can understand that the LCM of 813,961,420,945 is 984429180.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 813, 961, 420, 945
1. What is the LCM of 813, 961, 420, 945?
Answer: LCM of 813, 961, 420, 945 is 984429180.
2. How to calculate the LCM of 813, 961, 420, 945?
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 813, 961, 420, 945.
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}.