Given numbers are 815,940,865,21

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

The LCM of 815,940,865,21 is 556648260.

Find LCM of 815,940,865,21 with Prime Factorization

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

5 x 163 x 188 x 173 x 21 = 556648260

Therefore, the lowest common multiple of 815,940,865,21 is 556648260.

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.

815 x 940 x 865 x 21 = 13916206500

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.

815 : 1, 5, 163, 815

940 : 1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940

865 : 1, 5, 173, 865

21 : 1, 3, 7, 21

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 815,940,865,21, is 1.

Now, the common factors can be found like this.

815:5x 163

940:2x 2x 5x 47

865:5x 173

21:3x 7

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

5x 5 = 25

Therefore, the value for common factors is 25.

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 = 13916206500/(1x25)

LCM = 13916206500/25

LCM = 556648260

Thus, we can understand that the LCM of 815,940,865,21 is 556648260.

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

• LCM of 955, 529, 316, 84
• LCM of 805, 975, 762, 87
• LCM of 744, 229, 619, 94
• LCM of 165, 423, 276, 13
• LCM of 592, 945, 484, 40

1. What is the LCM of 815, 940, 865, 21?

Answer: LCM of 815, 940, 865, 21 is 556648260.

2. How to calculate the LCM of 815, 940, 865, 21?

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 815, 940, 865, 21.

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}.