A:
Positive:
1 x 40586882319 x 21361517151 x 2687873241 x 1684103587 x 6914292869 x 1414674579 x 8863711153 x 36391
Negative:
-1 x -405868823-19 x -21361517-151 x -2687873-241 x -1684103-587 x -691429-2869 x -141467-4579 x -88637-11153 x -36391
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 405,868,823, 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 | 405,868,823 | |
| -1 | -405,868,823 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 405,868,823.
Example:
1 x 405,868,823 = 405,868,823
and
-1 x -405,868,823 = 405,868,823
Notice both answers equal 405,868,823
With that explanation out of the way, let's continue. Next, we take the number 405,868,823 and divide it by 2:
405,868,823 ÷ 2 = 202,934,411.5
If the quotient is a whole number, then 2 and 202,934,411.5 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 | 405,868,823 | |
| -1 | -405,868,823 |
Now, we try dividing 405,868,823 by 3:
405,868,823 ÷ 3 = 135,289,607.6667
If the quotient is a whole number, then 3 and 135,289,607.6667 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 | 405,868,823 | |
| -1 | -405,868,823 |
Let's try dividing by 4:
405,868,823 ÷ 4 = 101,467,205.75
If the quotient is a whole number, then 4 and 101,467,205.75 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 | 405,868,823 | |
| -1 | 405,868,823 |
If you did it right, you will end up with this table:
| 1 | 19 | 151 | 241 | 587 | 2,869 | 4,579 | 11,153 | 36,391 | 88,637 | 141,467 | 691,429 | 1,684,103 | 2,687,873 | 21,361,517 | 405,868,823 |
| -1 | -19 | -151 | -241 | -587 | -2,869 | -4,579 | -11,153 | -36,391 | -88,637 | -141,467 | -691,429 | -1,684,103 | -2,687,873 | -21,361,517 | -405,868,823 |
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