LCM of 998, 712, 420, 398, 788
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 998, 712, 420, 398, 788 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, 712, 420, 398, 788. So, keep reading to learn more.
Given numbers are 998,712,420,398,788
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 998,712,420,398,788 is 1462477323720.
Find LCM of 998,712,420,398,788 with Prime Factorization
| 2 | 998, 712, 420, 398, 788 |
| 2 | 499, 356, 210, 199, 394 |
| 499, 178, 105, 199, 197 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 499 x 178 x 105 x 199 x 197 = 1462477323720
Therefore, the lowest common multiple of 998,712,420,398,788 is 1462477323720.
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 712 x 420 x 398 x 788 = 93598548718080
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
712 : 1, 2, 4, 8, 89, 178, 356, 712
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
398 : 1, 2, 199, 398
788 : 1, 2, 4, 197, 394, 788
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 998,712,420,398,788, is 2.
Now, the common factors can be found like this.
998:2x 499
712:2x 2x 2x 89
420:2x 2x 3x 5x 7
398:2x 199
788:2x 2x 197
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 2x 2x 2 = 32
Therefore, the value for common factors is 32.
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 = 93598548718080/(2x32)
LCM = 93598548718080/64
LCM = 1462477323720
Thus, we can understand that the LCM of 998,712,420,398,788 is 1462477323720.
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FAQs on LCM of 998, 712, 420, 398, 788
1. What is the LCM of 998, 712, 420, 398, 788?
Answer: LCM of 998, 712, 420, 398, 788 is 1462477323720.
2. How to calculate the LCM of 998, 712, 420, 398, 788?
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, 712, 420, 398, 788.
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}.