A:
Positive:
1 x 40524355311 x 3684032313 x 31172581143 x 2833871443 x 9147714873 x 831615759 x 703676397 x 63349
Negative:
-1 x -405243553-11 x -36840323-13 x -31172581-143 x -2833871-443 x -914771-4873 x -83161-5759 x -70367-6397 x -63349
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 405,243,553, 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 | 405,243,553 | |
| -1 | -405,243,553 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 405,243,553.
Example:
1 x 405,243,553 = 405,243,553
and
-1 x -405,243,553 = 405,243,553
Notice both answers equal 405,243,553
With that explanation out of the way, let's continue. Next, we take the number 405,243,553 and divide it by 2:
405,243,553 ÷ 2 = 202,621,776.5
If the quotient is a whole number, then 2 and 202,621,776.5 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 | 405,243,553 | |
| -1 | -405,243,553 |
Now, we try dividing 405,243,553 by 3:
405,243,553 ÷ 3 = 135,081,184.3333
If the quotient is a whole number, then 3 and 135,081,184.3333 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 | 405,243,553 | |
| -1 | -405,243,553 |
Let's try dividing by 4:
405,243,553 ÷ 4 = 101,310,888.25
If the quotient is a whole number, then 4 and 101,310,888.25 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 | 405,243,553 | |
| -1 | 405,243,553 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 143 | 443 | 4,873 | 5,759 | 6,397 | 63,349 | 70,367 | 83,161 | 914,771 | 2,833,871 | 31,172,581 | 36,840,323 | 405,243,553 |
| -1 | -11 | -13 | -143 | -443 | -4,873 | -5,759 | -6,397 | -63,349 | -70,367 | -83,161 | -914,771 | -2,833,871 | -31,172,581 | -36,840,323 | -405,243,553 |
Here are some more numbers to try:
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