A:
Positive:
1 x 156631255 x 313262519 x 82437525 x 62652595 x 164875125 x 125305475 x 32975625 x 250611319 x 118752375 x 6595
Negative:
-1 x -15663125-5 x -3132625-19 x -824375-25 x -626525-95 x -164875-125 x -125305-475 x -32975-625 x -25061-1319 x -11875-2375 x -6595
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 15,663,125, 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 | 15,663,125 | |
| -1 | -15,663,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,663,125.
Example:
1 x 15,663,125 = 15,663,125
and
-1 x -15,663,125 = 15,663,125
Notice both answers equal 15,663,125
With that explanation out of the way, let's continue. Next, we take the number 15,663,125 and divide it by 2:
15,663,125 ÷ 2 = 7,831,562.5
If the quotient is a whole number, then 2 and 7,831,562.5 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 | 15,663,125 | |
| -1 | -15,663,125 |
Now, we try dividing 15,663,125 by 3:
15,663,125 ÷ 3 = 5,221,041.6667
If the quotient is a whole number, then 3 and 5,221,041.6667 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 | 15,663,125 | |
| -1 | -15,663,125 |
Let's try dividing by 4:
15,663,125 ÷ 4 = 3,915,781.25
If the quotient is a whole number, then 4 and 3,915,781.25 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 | 15,663,125 | |
| -1 | 15,663,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 25 | 95 | 125 | 475 | 625 | 1,319 | 2,375 | 6,595 | 11,875 | 25,061 | 32,975 | 125,305 | 164,875 | 626,525 | 824,375 | 3,132,625 | 15,663,125 |
| -1 | -5 | -19 | -25 | -95 | -125 | -475 | -625 | -1,319 | -2,375 | -6,595 | -11,875 | -25,061 | -32,975 | -125,305 | -164,875 | -626,525 | -824,375 | -3,132,625 | -15,663,125 |
Here are some more numbers to try:
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