LCM of 981, 357, 398, 280
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 981, 357, 398, 280 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, 357, 398, 280. So, keep reading to learn more.
Given numbers are 981,357,398,280
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 981,357,398,280 is 929242440.
Find LCM of 981,357,398,280 with Prime Factorization
| 2 | 981, 357, 398, 280 |
| 3 | 981, 357, 199, 140 |
| 7 | 327, 119, 199, 140 |
| 327, 17, 199, 20 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 7 x 327 x 17 x 199 x 20 = 929242440
Therefore, the lowest common multiple of 981,357,398,280 is 929242440.
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 357 x 398 x 280 = 39028182480
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
357 : 1, 3, 7, 17, 21, 51, 119, 357
398 : 1, 2, 199, 398
280 : 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 981,357,398,280, is 1.
Now, the common factors can be found like this.
981:3x 3x 109
357:3x 7x 17
398:2x 199
280:2x 2x 2x 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.
2x 3x 7 = 42
Therefore, the value for common factors is 42.
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 = 39028182480/(1x42)
LCM = 39028182480/42
LCM = 929242440
Thus, we can understand that the LCM of 981,357,398,280 is 929242440.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 981, 357, 398, 280
1. What is the LCM of 981, 357, 398, 280?
Answer: LCM of 981, 357, 398, 280 is 929242440.
2. How to calculate the LCM of 981, 357, 398, 280?
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, 357, 398, 280.
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}.