A:
Positive:
1 x 2215413255 x 4430826525 x 886165353 x 418002561 x 3631825265 x 836005305 x 7263651325 x 1672011525 x 1452732741 x 808253233 x 6852513705 x 16165
Negative:
-1 x -221541325-5 x -44308265-25 x -8861653-53 x -4180025-61 x -3631825-265 x -836005-305 x -726365-1325 x -167201-1525 x -145273-2741 x -80825-3233 x -68525-13705 x -16165
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 221,541,325, 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 | 221,541,325 | |
| -1 | -221,541,325 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 221,541,325.
Example:
1 x 221,541,325 = 221,541,325
and
-1 x -221,541,325 = 221,541,325
Notice both answers equal 221,541,325
With that explanation out of the way, let's continue. Next, we take the number 221,541,325 and divide it by 2:
221,541,325 ÷ 2 = 110,770,662.5
If the quotient is a whole number, then 2 and 110,770,662.5 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 | 221,541,325 | |
| -1 | -221,541,325 |
Now, we try dividing 221,541,325 by 3:
221,541,325 ÷ 3 = 73,847,108.3333
If the quotient is a whole number, then 3 and 73,847,108.3333 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 | 221,541,325 | |
| -1 | -221,541,325 |
Let's try dividing by 4:
221,541,325 ÷ 4 = 55,385,331.25
If the quotient is a whole number, then 4 and 55,385,331.25 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 | 221,541,325 | |
| -1 | 221,541,325 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 53 | 61 | 265 | 305 | 1,325 | 1,525 | 2,741 | 3,233 | 13,705 | 16,165 | 68,525 | 80,825 | 145,273 | 167,201 | 726,365 | 836,005 | 3,631,825 | 4,180,025 | 8,861,653 | 44,308,265 | 221,541,325 |
| -1 | -5 | -25 | -53 | -61 | -265 | -305 | -1,325 | -1,525 | -2,741 | -3,233 | -13,705 | -16,165 | -68,525 | -80,825 | -145,273 | -167,201 | -726,365 | -836,005 | -3,631,825 | -4,180,025 | -8,861,653 | -44,308,265 | -221,541,325 |
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