LCM of 981, 490, 605, 889, 642
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 981, 490, 605, 889, 642 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, 490, 605, 889, 642. So, keep reading to learn more.
Given numbers are 981,490,605,889,642
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 981,490,605,889,642 is 790383665610.
Find LCM of 981,490,605,889,642 with Prime Factorization
| 2 | 981, 490, 605, 889, 642 |
| 3 | 981, 245, 605, 889, 321 |
| 5 | 327, 245, 605, 889, 107 |
| 7 | 327, 49, 121, 889, 107 |
| 327, 7, 121, 127, 107 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 7 x 327 x 7 x 121 x 127 x 107 = 790383665610
Therefore, the lowest common multiple of 981,490,605,889,642 is 790383665610.
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 490 x 605 x 889 x 642 = 165980569778100
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
490 : 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490
605 : 1, 5, 11, 55, 121, 605
889 : 1, 7, 127, 889
642 : 1, 2, 3, 6, 107, 214, 321, 642
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 981,490,605,889,642, is 1.
Now, the common factors can be found like this.
981:3x 3x 109
490:2x 5x 7x 7
605:5x 11x 11
889:7x 127
642:2x 3x 107
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 5x 7 = 210
Therefore, the value for common factors is 210.
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 = 165980569778100/(1x210)
LCM = 165980569778100/210
LCM = 790383665610
Thus, we can understand that the LCM of 981,490,605,889,642 is 790383665610.
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FAQs on LCM of 981, 490, 605, 889, 642
1. What is the LCM of 981, 490, 605, 889, 642?
Answer: LCM of 981, 490, 605, 889, 642 is 790383665610.
2. How to calculate the LCM of 981, 490, 605, 889, 642?
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, 490, 605, 889, 642.
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}.