LCM of 794, 378, 836, 420
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 794, 378, 836, 420 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 794, 378, 836, 420. So, keep reading to learn more.
Given numbers are 794,378,836,420
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 794,378,836,420 is 313637940.
Find LCM of 794,378,836,420 with Prime Factorization
| 2 | 794, 378, 836, 420 |
| 2 | 397, 189, 418, 210 |
| 3 | 397, 189, 209, 105 |
| 7 | 397, 63, 209, 35 |
| 397, 9, 209, 5 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 7 x 397 x 9 x 209 x 5 = 313637940
Therefore, the lowest common multiple of 794,378,836,420 is 313637940.
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.
794 x 378 x 836 x 420 = 105382347840
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.
794 : 1, 2, 397, 794
378 : 1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 378
836 : 1, 2, 4, 11, 19, 22, 38, 44, 76, 209, 418, 836
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
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 794,378,836,420, is 2.
Now, the common factors can be found like this.
794:2x 397
378:2x 3x 3x 3x 7
836:2x 2x 11x 19
420:2x 2x 3x 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 2x 2x 3x 7 = 168
Therefore, the value for common factors is 168.
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 = 105382347840/(2x168)
LCM = 105382347840/336
LCM = 313637940
Thus, we can understand that the LCM of 794,378,836,420 is 313637940.
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FAQs on LCM of 794, 378, 836, 420
1. What is the LCM of 794, 378, 836, 420?
Answer: LCM of 794, 378, 836, 420 is 313637940.
2. How to calculate the LCM of 794, 378, 836, 420?
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 794, 378, 836, 420.
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}.