Given numbers are 394,121,720,645

The least common multiple of numbers can be find using the prime factorization method or LCM formula.

The LCM of 394,121,720,645 is 737993520.

Find LCM of 394,121,720,645 with Prime Factorization

Multiply the prime numbers at the bottom and the left side.

2 x 3 x 5 x 197 x 121 x 24 x 43 = 737993520

Therefore, the lowest common multiple of 394,121,720,645 is 737993520.

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.

394 x 121 x 720 x 645 = 22139805600

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.

394 : 1, 2, 197, 394

121 : 1, 11, 121

720 : 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720

645 : 1, 3, 5, 15, 43, 129, 215, 645

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 394,121,720,645, is 1.

Now, the common factors can be found like this.

394:2x 197

121:11x 11

720:2x 2x 2x 2x 3x 3x 5

645:3x 5x 43

From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.

2x 3x 5 = 30

Therefore, the value for common factors is 30.

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 = 22139805600/(1x30)

LCM = 22139805600/30

LCM = 737993520

Thus, we can understand that the LCM of 394,121,720,645 is 737993520.

Here are some samples of LCM of two or more Numbers calculations.

• LCM of 862, 883, 610, 742
• LCM of 384, 442, 936, 332
• LCM of 227, 604, 932, 875
• LCM of 946, 333, 488, 356
• LCM of 116, 466, 247, 227

1. What is the LCM of 394, 121, 720, 645?

Answer: LCM of 394, 121, 720, 645 is 737993520.

2. How to calculate the LCM of 394, 121, 720, 645?

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 394, 121, 720, 645.

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}.