A:
Positive:
1 x 32003202117 x 18825413103 x 3107107193 x 1658197947 x 3379431751 x 1827713281 x 9754116099 x 19879
Negative:
-1 x -320032021-17 x -18825413-103 x -3107107-193 x -1658197-947 x -337943-1751 x -182771-3281 x -97541-16099 x -19879
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 320,032,021, 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 | 320,032,021 | |
| -1 | -320,032,021 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 320,032,021.
Example:
1 x 320,032,021 = 320,032,021
and
-1 x -320,032,021 = 320,032,021
Notice both answers equal 320,032,021
With that explanation out of the way, let's continue. Next, we take the number 320,032,021 and divide it by 2:
320,032,021 ÷ 2 = 160,016,010.5
If the quotient is a whole number, then 2 and 160,016,010.5 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 | 320,032,021 | |
| -1 | -320,032,021 |
Now, we try dividing 320,032,021 by 3:
320,032,021 ÷ 3 = 106,677,340.3333
If the quotient is a whole number, then 3 and 106,677,340.3333 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 | 320,032,021 | |
| -1 | -320,032,021 |
Let's try dividing by 4:
320,032,021 ÷ 4 = 80,008,005.25
If the quotient is a whole number, then 4 and 80,008,005.25 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 | 320,032,021 | |
| -1 | 320,032,021 |
If you did it right, you will end up with this table:
| 1 | 17 | 103 | 193 | 947 | 1,751 | 3,281 | 16,099 | 19,879 | 97,541 | 182,771 | 337,943 | 1,658,197 | 3,107,107 | 18,825,413 | 320,032,021 |
| -1 | -17 | -103 | -193 | -947 | -1,751 | -3,281 | -16,099 | -19,879 | -97,541 | -182,771 | -337,943 | -1,658,197 | -3,107,107 | -18,825,413 | -320,032,021 |
Here are some more numbers to try:
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