A:
Positive:
1 x 162106255 x 324212525 x 64842537 x 438125125 x 129685185 x 87625625 x 25937701 x 23125925 x 175253505 x 4625
Negative:
-1 x -16210625-5 x -3242125-25 x -648425-37 x -438125-125 x -129685-185 x -87625-625 x -25937-701 x -23125-925 x -17525-3505 x -4625
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 16,210,625, 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 | 16,210,625 | |
| -1 | -16,210,625 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,210,625.
Example:
1 x 16,210,625 = 16,210,625
and
-1 x -16,210,625 = 16,210,625
Notice both answers equal 16,210,625
With that explanation out of the way, let's continue. Next, we take the number 16,210,625 and divide it by 2:
16,210,625 ÷ 2 = 8,105,312.5
If the quotient is a whole number, then 2 and 8,105,312.5 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 | 16,210,625 | |
| -1 | -16,210,625 |
Now, we try dividing 16,210,625 by 3:
16,210,625 ÷ 3 = 5,403,541.6667
If the quotient is a whole number, then 3 and 5,403,541.6667 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 | 16,210,625 | |
| -1 | -16,210,625 |
Let's try dividing by 4:
16,210,625 ÷ 4 = 4,052,656.25
If the quotient is a whole number, then 4 and 4,052,656.25 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 | 16,210,625 | |
| -1 | 16,210,625 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 37 | 125 | 185 | 625 | 701 | 925 | 3,505 | 4,625 | 17,525 | 23,125 | 25,937 | 87,625 | 129,685 | 438,125 | 648,425 | 3,242,125 | 16,210,625 |
| -1 | -5 | -25 | -37 | -125 | -185 | -625 | -701 | -925 | -3,505 | -4,625 | -17,525 | -23,125 | -25,937 | -87,625 | -129,685 | -438,125 | -648,425 | -3,242,125 | -16,210,625 |
Here are some more numbers to try:
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