A:
Positive:
1 x 4056613555 x 8113227111 x 3687830543 x 943398555 x 7375661215 x 1886797473 x 8576351849 x 2193952365 x 1715273989 x 1016959245 x 4387919945 x 20339
Negative:
-1 x -405661355-5 x -81132271-11 x -36878305-43 x -9433985-55 x -7375661-215 x -1886797-473 x -857635-1849 x -219395-2365 x -171527-3989 x -101695-9245 x -43879-19945 x -20339
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 405,661,355, 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 | 405,661,355 | |
| -1 | -405,661,355 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 405,661,355.
Example:
1 x 405,661,355 = 405,661,355
and
-1 x -405,661,355 = 405,661,355
Notice both answers equal 405,661,355
With that explanation out of the way, let's continue. Next, we take the number 405,661,355 and divide it by 2:
405,661,355 ÷ 2 = 202,830,677.5
If the quotient is a whole number, then 2 and 202,830,677.5 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 | 405,661,355 | |
| -1 | -405,661,355 |
Now, we try dividing 405,661,355 by 3:
405,661,355 ÷ 3 = 135,220,451.6667
If the quotient is a whole number, then 3 and 135,220,451.6667 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 | 405,661,355 | |
| -1 | -405,661,355 |
Let's try dividing by 4:
405,661,355 ÷ 4 = 101,415,338.75
If the quotient is a whole number, then 4 and 101,415,338.75 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 | 405,661,355 | |
| -1 | 405,661,355 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 43 | 55 | 215 | 473 | 1,849 | 2,365 | 3,989 | 9,245 | 19,945 | 20,339 | 43,879 | 101,695 | 171,527 | 219,395 | 857,635 | 1,886,797 | 7,375,661 | 9,433,985 | 36,878,305 | 81,132,271 | 405,661,355 |
| -1 | -5 | -11 | -43 | -55 | -215 | -473 | -1,849 | -2,365 | -3,989 | -9,245 | -19,945 | -20,339 | -43,879 | -101,695 | -171,527 | -219,395 | -857,635 | -1,886,797 | -7,375,661 | -9,433,985 | -36,878,305 | -81,132,271 | -405,661,355 |
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