LCM of 998, 721, 980, 638
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 998, 721, 980, 638 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 998, 721, 980, 638. So, keep reading to learn more.
Given numbers are 998,721,980,638
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 998,721,980,638 is 16067730140.
Find LCM of 998,721,980,638 with Prime Factorization
| 2 | 998, 721, 980, 638 |
| 7 | 499, 721, 490, 319 |
| 499, 103, 70, 319 |
Multiply the prime numbers at the bottom and the left side.
2 x 7 x 499 x 103 x 70 x 319 = 16067730140
Therefore, the lowest common multiple of 998,721,980,638 is 16067730140.
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.
998 x 721 x 980 x 638 = 449896443920
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.
998 : 1, 2, 499, 998
721 : 1, 7, 103, 721
980 : 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980
638 : 1, 2, 11, 22, 29, 58, 319, 638
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 998,721,980,638, is 1.
Now, the common factors can be found like this.
998:2x 499
721:7x 103
980:2x 2x 5x 7x 7
638:2x 11x 29
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 7 = 28
Therefore, the value for common factors is 28.
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 = 449896443920/(1x28)
LCM = 449896443920/28
LCM = 16067730140
Thus, we can understand that the LCM of 998,721,980,638 is 16067730140.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 998, 721, 980, 638
1. What is the LCM of 998, 721, 980, 638?
Answer: LCM of 998, 721, 980, 638 is 16067730140.
2. How to calculate the LCM of 998, 721, 980, 638?
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 998, 721, 980, 638.
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}.