LCM of 635, 240, 391, 978, 690
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 635, 240, 391, 978, 690 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 635, 240, 391, 978, 690. So, keep reading to learn more.
Given numbers are 635,240,391,978,690
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 635,240,391,978,690 is 1942581840.
Find LCM of 635,240,391,978,690 with Prime Factorization
| 2 | 635, 240, 391, 978, 690 |
| 3 | 635, 120, 391, 489, 345 |
| 5 | 635, 40, 391, 163, 115 |
| 23 | 127, 8, 391, 163, 23 |
| 127, 8, 17, 163, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 23 x 127 x 8 x 17 x 163 x 1 = 1942581840
Therefore, the lowest common multiple of 635,240,391,978,690 is 1942581840.
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.
635 x 240 x 391 x 978 x 690 = 40211444088000
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.
635 : 1, 5, 127, 635
240 : 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240
391 : 1, 17, 23, 391
978 : 1, 2, 3, 6, 163, 326, 489, 978
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 635,240,391,978,690, is 1.
Now, the common factors can be found like this.
635:5x 127
240:2x 2x 2x 2x 3x 5
391:17x 23
978:2x 3x 163
690:2x 3x 5x 23
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 3x 3x 5x 5x 23 = 20700
Therefore, the value for common factors is 20700.
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 = 40211444088000/(1x20700)
LCM = 40211444088000/20700
LCM = 1942581840
Thus, we can understand that the LCM of 635,240,391,978,690 is 1942581840.
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FAQs on LCM of 635, 240, 391, 978, 690
1. What is the LCM of 635, 240, 391, 978, 690?
Answer: LCM of 635, 240, 391, 978, 690 is 1942581840.
2. How to calculate the LCM of 635, 240, 391, 978, 690?
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 635, 240, 391, 978, 690.
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}.