A:
Positive:
1 x 3210212355 x 6420424723 x 13957445115 x 2791489787 x 4079053547 x 905053935 x 8158117735 x 18101
Negative:
-1 x -321021235-5 x -64204247-23 x -13957445-115 x -2791489-787 x -407905-3547 x -90505-3935 x -81581-17735 x -18101
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 321,021,235, 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 | 321,021,235 | |
| -1 | -321,021,235 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 321,021,235.
Example:
1 x 321,021,235 = 321,021,235
and
-1 x -321,021,235 = 321,021,235
Notice both answers equal 321,021,235
With that explanation out of the way, let's continue. Next, we take the number 321,021,235 and divide it by 2:
321,021,235 ÷ 2 = 160,510,617.5
If the quotient is a whole number, then 2 and 160,510,617.5 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 | 321,021,235 | |
| -1 | -321,021,235 |
Now, we try dividing 321,021,235 by 3:
321,021,235 ÷ 3 = 107,007,078.3333
If the quotient is a whole number, then 3 and 107,007,078.3333 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 | 321,021,235 | |
| -1 | -321,021,235 |
Let's try dividing by 4:
321,021,235 ÷ 4 = 80,255,308.75
If the quotient is a whole number, then 4 and 80,255,308.75 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 | 321,021,235 | |
| -1 | 321,021,235 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 787 | 3,547 | 3,935 | 17,735 | 18,101 | 81,581 | 90,505 | 407,905 | 2,791,489 | 13,957,445 | 64,204,247 | 321,021,235 |
| -1 | -5 | -23 | -115 | -787 | -3,547 | -3,935 | -17,735 | -18,101 | -81,581 | -90,505 | -407,905 | -2,791,489 | -13,957,445 | -64,204,247 | -321,021,235 |
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