A:
Positive:
1 x 151416255 x 302832525 x 60566529 x 522125125 x 121133145 x 104425725 x 208853625 x 4177
Negative:
-1 x -15141625-5 x -3028325-25 x -605665-29 x -522125-125 x -121133-145 x -104425-725 x -20885-3625 x -4177
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 15,141,625, 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 | 15,141,625 | |
| -1 | -15,141,625 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,141,625.
Example:
1 x 15,141,625 = 15,141,625
and
-1 x -15,141,625 = 15,141,625
Notice both answers equal 15,141,625
With that explanation out of the way, let's continue. Next, we take the number 15,141,625 and divide it by 2:
15,141,625 ÷ 2 = 7,570,812.5
If the quotient is a whole number, then 2 and 7,570,812.5 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 | 15,141,625 | |
| -1 | -15,141,625 |
Now, we try dividing 15,141,625 by 3:
15,141,625 ÷ 3 = 5,047,208.3333
If the quotient is a whole number, then 3 and 5,047,208.3333 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 | 15,141,625 | |
| -1 | -15,141,625 |
Let's try dividing by 4:
15,141,625 ÷ 4 = 3,785,406.25
If the quotient is a whole number, then 4 and 3,785,406.25 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 | 15,141,625 | |
| -1 | 15,141,625 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 29 | 125 | 145 | 725 | 3,625 | 4,177 | 20,885 | 104,425 | 121,133 | 522,125 | 605,665 | 3,028,325 | 15,141,625 |
| -1 | -5 | -25 | -29 | -125 | -145 | -725 | -3,625 | -4,177 | -20,885 | -104,425 | -121,133 | -522,125 | -605,665 | -3,028,325 | -15,141,625 |
Here are some more numbers to try:
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