Given numbers are 665,390,690,720

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

The LCM of 665,390,690,720 is 28632240.

Find LCM of 665,390,690,720 with Prime Factorization

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

2 x 3 x 5 x 133 x 13 x 23 x 24 = 28632240

Therefore, the lowest common multiple of 665,390,690,720 is 28632240.

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.

665 x 390 x 690 x 720 = 128845080000

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.

665 : 1, 5, 7, 19, 35, 95, 133, 665

390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390

690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690

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

5 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 665,390,690,720, is 5.

Now, the common factors can be found like this.

665:5x 7x 19

390:2x 3x 5x 13

690:2x 3x 5x 23

720:2x 2x 2x 2x 3x 3x 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 3x 3x 5x 5 = 900

Therefore, the value for common factors is 900.

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 = 128845080000/(5x900)

LCM = 128845080000/4500

LCM = 28632240

Thus, we can understand that the LCM of 665,390,690,720 is 28632240.

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

• LCM of 533, 329, 710, 828
• LCM of 907, 494, 682, 625
• LCM of 597, 127, 571, 817
• LCM of 286, 734, 192, 726
• LCM of 229, 972, 443, 665

1. What is the LCM of 665, 390, 690, 720?

Answer: LCM of 665, 390, 690, 720 is 28632240.

2. How to calculate the LCM of 665, 390, 690, 720?

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 665, 390, 690, 720.

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}.