A:
Positive:
1 x 1521001911 x 138272917 x 894707163 x 93313187 x 81337499 x 304811793 x 84832771 x 5489
Negative:
-1 x -15210019-11 x -1382729-17 x -894707-163 x -93313-187 x -81337-499 x -30481-1793 x -8483-2771 x -5489
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 15,210,019, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 15,210,019 | |
| -1 | -15,210,019 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,210,019.
Example:
1 x 15,210,019 = 15,210,019
and
-1 x -15,210,019 = 15,210,019
Notice both answers equal 15,210,019
With that explanation out of the way, let's continue. Next, we take the number 15,210,019 and divide it by 2:
15,210,019 ÷ 2 = 7,605,009.5
If the quotient is a whole number, then 2 and 7,605,009.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 15,210,019 | |
| -1 | -15,210,019 |
Now, we try dividing 15,210,019 by 3:
15,210,019 ÷ 3 = 5,070,006.3333
If the quotient is a whole number, then 3 and 5,070,006.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 15,210,019 | |
| -1 | -15,210,019 |
Let's try dividing by 4:
15,210,019 ÷ 4 = 3,802,504.75
If the quotient is a whole number, then 4 and 3,802,504.75 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 15,210,019 | |
| -1 | 15,210,019 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 163 | 187 | 499 | 1,793 | 2,771 | 5,489 | 8,483 | 30,481 | 81,337 | 93,313 | 894,707 | 1,382,729 | 15,210,019 |
| -1 | -11 | -17 | -163 | -187 | -499 | -1,793 | -2,771 | -5,489 | -8,483 | -30,481 | -81,337 | -93,313 | -894,707 | -1,382,729 | -15,210,019 |
Here are some more numbers to try:
Try the factor calculator