A:
Positive:
1 x 154054555 x 308109113 x 118503565 x 23700789 x 173095445 x 346191157 x 133152663 x 5785
Negative:
-1 x -15405455-5 x -3081091-13 x -1185035-65 x -237007-89 x -173095-445 x -34619-1157 x -13315-2663 x -5785
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 15,405,455, 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 | 15,405,455 | |
| -1 | -15,405,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,405,455.
Example:
1 x 15,405,455 = 15,405,455
and
-1 x -15,405,455 = 15,405,455
Notice both answers equal 15,405,455
With that explanation out of the way, let's continue. Next, we take the number 15,405,455 and divide it by 2:
15,405,455 ÷ 2 = 7,702,727.5
If the quotient is a whole number, then 2 and 7,702,727.5 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 | 15,405,455 | |
| -1 | -15,405,455 |
Now, we try dividing 15,405,455 by 3:
15,405,455 ÷ 3 = 5,135,151.6667
If the quotient is a whole number, then 3 and 5,135,151.6667 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 | 15,405,455 | |
| -1 | -15,405,455 |
Let's try dividing by 4:
15,405,455 ÷ 4 = 3,851,363.75
If the quotient is a whole number, then 4 and 3,851,363.75 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 | 15,405,455 | |
| -1 | 15,405,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 89 | 445 | 1,157 | 2,663 | 5,785 | 13,315 | 34,619 | 173,095 | 237,007 | 1,185,035 | 3,081,091 | 15,405,455 |
| -1 | -5 | -13 | -65 | -89 | -445 | -1,157 | -2,663 | -5,785 | -13,315 | -34,619 | -173,095 | -237,007 | -1,185,035 | -3,081,091 | -15,405,455 |
Here are some more numbers to try:
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