A:
Positive:
1 x 4055078655 x 811015737 x 5792969535 x 11585939263 x 15418551315 x 3083711841 x 2202659205 x 44053
Negative:
-1 x -405507865-5 x -81101573-7 x -57929695-35 x -11585939-263 x -1541855-1315 x -308371-1841 x -220265-9205 x -44053
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 405,507,865, 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 | 405,507,865 | |
| -1 | -405,507,865 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 405,507,865.
Example:
1 x 405,507,865 = 405,507,865
and
-1 x -405,507,865 = 405,507,865
Notice both answers equal 405,507,865
With that explanation out of the way, let's continue. Next, we take the number 405,507,865 and divide it by 2:
405,507,865 ÷ 2 = 202,753,932.5
If the quotient is a whole number, then 2 and 202,753,932.5 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 | 405,507,865 | |
| -1 | -405,507,865 |
Now, we try dividing 405,507,865 by 3:
405,507,865 ÷ 3 = 135,169,288.3333
If the quotient is a whole number, then 3 and 135,169,288.3333 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 | 405,507,865 | |
| -1 | -405,507,865 |
Let's try dividing by 4:
405,507,865 ÷ 4 = 101,376,966.25
If the quotient is a whole number, then 4 and 101,376,966.25 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 | 405,507,865 | |
| -1 | 405,507,865 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 263 | 1,315 | 1,841 | 9,205 | 44,053 | 220,265 | 308,371 | 1,541,855 | 11,585,939 | 57,929,695 | 81,101,573 | 405,507,865 |
| -1 | -5 | -7 | -35 | -263 | -1,315 | -1,841 | -9,205 | -44,053 | -220,265 | -308,371 | -1,541,855 | -11,585,939 | -57,929,695 | -81,101,573 | -405,507,865 |
Here are some more numbers to try:
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