A:
Positive:
1 x 2251520155 x 4503040311 x 2046836555 x 40936731801 x 1250152273 x 990559005 x 2500311365 x 19811
Negative:
-1 x -225152015-5 x -45030403-11 x -20468365-55 x -4093673-1801 x -125015-2273 x -99055-9005 x -25003-11365 x -19811
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 225,152,015, 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 | 225,152,015 | |
| -1 | -225,152,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 225,152,015.
Example:
1 x 225,152,015 = 225,152,015
and
-1 x -225,152,015 = 225,152,015
Notice both answers equal 225,152,015
With that explanation out of the way, let's continue. Next, we take the number 225,152,015 and divide it by 2:
225,152,015 ÷ 2 = 112,576,007.5
If the quotient is a whole number, then 2 and 112,576,007.5 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 | 225,152,015 | |
| -1 | -225,152,015 |
Now, we try dividing 225,152,015 by 3:
225,152,015 ÷ 3 = 75,050,671.6667
If the quotient is a whole number, then 3 and 75,050,671.6667 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 | 225,152,015 | |
| -1 | -225,152,015 |
Let's try dividing by 4:
225,152,015 ÷ 4 = 56,288,003.75
If the quotient is a whole number, then 4 and 56,288,003.75 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 | 225,152,015 | |
| -1 | 225,152,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 1,801 | 2,273 | 9,005 | 11,365 | 19,811 | 25,003 | 99,055 | 125,015 | 4,093,673 | 20,468,365 | 45,030,403 | 225,152,015 |
| -1 | -5 | -11 | -55 | -1,801 | -2,273 | -9,005 | -11,365 | -19,811 | -25,003 | -99,055 | -125,015 | -4,093,673 | -20,468,365 | -45,030,403 | -225,152,015 |
Here are some more numbers to try:
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