LCM of 676, 654, 920, 420
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 676, 654, 920, 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 676, 654, 920, 420. So, keep reading to learn more.
Given numbers are 676,654,920,420
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 676,654,920,420 is 355893720.
Find LCM of 676,654,920,420 with Prime Factorization
| 2 | 676, 654, 920, 420 |
| 2 | 338, 327, 460, 210 |
| 3 | 169, 327, 230, 105 |
| 5 | 169, 109, 230, 35 |
| 169, 109, 46, 7 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 169 x 109 x 46 x 7 = 355893720
Therefore, the lowest common multiple of 676,654,920,420 is 355893720.
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.
676 x 654 x 920 x 420 = 170828985600
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.
676 : 1, 2, 4, 13, 26, 52, 169, 338, 676
654 : 1, 2, 3, 6, 109, 218, 327, 654
920 : 1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920
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 676,654,920,420, is 2.
Now, the common factors can be found like this.
676:2x 2x 13x 13
654:2x 3x 109
920:2x 2x 2x 5x 23
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 2x 3x 5 = 240
Therefore, the value for common factors is 240.
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 = 170828985600/(2x240)
LCM = 170828985600/480
LCM = 355893720
Thus, we can understand that the LCM of 676,654,920,420 is 355893720.
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FAQs on LCM of 676, 654, 920, 420
1. What is the LCM of 676, 654, 920, 420?
Answer: LCM of 676, 654, 920, 420 is 355893720.
2. How to calculate the LCM of 676, 654, 920, 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 676, 654, 920, 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}.