A:
Positive:
1 x 159991255 x 319982517 x 94112525 x 63996585 x 188225125 x 127993425 x 376452125 x 7529
Negative:
-1 x -15999125-5 x -3199825-17 x -941125-25 x -639965-85 x -188225-125 x -127993-425 x -37645-2125 x -7529
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 15,999,125, 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 | 15,999,125 | |
| -1 | -15,999,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,999,125.
Example:
1 x 15,999,125 = 15,999,125
and
-1 x -15,999,125 = 15,999,125
Notice both answers equal 15,999,125
With that explanation out of the way, let's continue. Next, we take the number 15,999,125 and divide it by 2:
15,999,125 ÷ 2 = 7,999,562.5
If the quotient is a whole number, then 2 and 7,999,562.5 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 | 15,999,125 | |
| -1 | -15,999,125 |
Now, we try dividing 15,999,125 by 3:
15,999,125 ÷ 3 = 5,333,041.6667
If the quotient is a whole number, then 3 and 5,333,041.6667 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 | 15,999,125 | |
| -1 | -15,999,125 |
Let's try dividing by 4:
15,999,125 ÷ 4 = 3,999,781.25
If the quotient is a whole number, then 4 and 3,999,781.25 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 | 15,999,125 | |
| -1 | 15,999,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 25 | 85 | 125 | 425 | 2,125 | 7,529 | 37,645 | 127,993 | 188,225 | 639,965 | 941,125 | 3,199,825 | 15,999,125 |
| -1 | -5 | -17 | -25 | -85 | -125 | -425 | -2,125 | -7,529 | -37,645 | -127,993 | -188,225 | -639,965 | -941,125 | -3,199,825 | -15,999,125 |
Here are some more numbers to try:
Try the factor calculator