LCM of 780, 988, 693, 640
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 780, 988, 693, 640 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 780, 988, 693, 640. So, keep reading to learn more.
Given numbers are 780,988,693,640
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 780,988,693,640 is 109549440.
Find LCM of 780,988,693,640 with Prime Factorization
| 2 | 780, 988, 693, 640 |
| 2 | 390, 494, 693, 320 |
| 3 | 195, 247, 693, 160 |
| 5 | 65, 247, 231, 160 |
| 13 | 13, 247, 231, 32 |
| 1, 19, 231, 32 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 13 x 1 x 19 x 231 x 32 = 109549440
Therefore, the lowest common multiple of 780,988,693,640 is 109549440.
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.
780 x 988 x 693 x 640 = 341794252800
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.
780 : 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
988 : 1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 988
693 : 1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 231, 693
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 780,988,693,640, is 1.
Now, the common factors can be found like this.
780:2x 2x 3x 5x 13
988:2x 2x 13x 19
693:3x 3x 7x 11
640:2x 2x 2x 2x 2x 2x 2x 5
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 5x 13 = 3120
Therefore, the value for common factors is 3120.
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 = 341794252800/(1x3120)
LCM = 341794252800/3120
LCM = 109549440
Thus, we can understand that the LCM of 780,988,693,640 is 109549440.
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FAQs on LCM of 780, 988, 693, 640
1. What is the LCM of 780, 988, 693, 640?
Answer: LCM of 780, 988, 693, 640 is 109549440.
2. How to calculate the LCM of 780, 988, 693, 640?
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 780, 988, 693, 640.
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}.