A:
Positive:
1 x 2027219817 x 2896028311 x 1842927177 x 26327531321 x 1534611993 x 1017179247 x 2192313951 x 14531
Negative:
-1 x -202721981-7 x -28960283-11 x -18429271-77 x -2632753-1321 x -153461-1993 x -101717-9247 x -21923-13951 x -14531
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 202,721,981, 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 | 202,721,981 | |
| -1 | -202,721,981 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 202,721,981.
Example:
1 x 202,721,981 = 202,721,981
and
-1 x -202,721,981 = 202,721,981
Notice both answers equal 202,721,981
With that explanation out of the way, let's continue. Next, we take the number 202,721,981 and divide it by 2:
202,721,981 ÷ 2 = 101,360,990.5
If the quotient is a whole number, then 2 and 101,360,990.5 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 | 202,721,981 | |
| -1 | -202,721,981 |
Now, we try dividing 202,721,981 by 3:
202,721,981 ÷ 3 = 67,573,993.6667
If the quotient is a whole number, then 3 and 67,573,993.6667 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 | 202,721,981 | |
| -1 | -202,721,981 |
Let's try dividing by 4:
202,721,981 ÷ 4 = 50,680,495.25
If the quotient is a whole number, then 4 and 50,680,495.25 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 | 202,721,981 | |
| -1 | 202,721,981 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 1,321 | 1,993 | 9,247 | 13,951 | 14,531 | 21,923 | 101,717 | 153,461 | 2,632,753 | 18,429,271 | 28,960,283 | 202,721,981 |
| -1 | -7 | -11 | -77 | -1,321 | -1,993 | -9,247 | -13,951 | -14,531 | -21,923 | -101,717 | -153,461 | -2,632,753 | -18,429,271 | -28,960,283 | -202,721,981 |
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