A:
Positive:
1 x 1716428155 x 3432856331 x 553686537 x 4638995155 x 1107373173 x 992155185 x 927799865 x 1984311147 x 1496455363 x 320055735 x 299296401 x 26815
Negative:
-1 x -171642815-5 x -34328563-31 x -5536865-37 x -4638995-155 x -1107373-173 x -992155-185 x -927799-865 x -198431-1147 x -149645-5363 x -32005-5735 x -29929-6401 x -26815
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 171,642,815, 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 | 171,642,815 | |
| -1 | -171,642,815 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 171,642,815.
Example:
1 x 171,642,815 = 171,642,815
and
-1 x -171,642,815 = 171,642,815
Notice both answers equal 171,642,815
With that explanation out of the way, let's continue. Next, we take the number 171,642,815 and divide it by 2:
171,642,815 ÷ 2 = 85,821,407.5
If the quotient is a whole number, then 2 and 85,821,407.5 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 | 171,642,815 | |
| -1 | -171,642,815 |
Now, we try dividing 171,642,815 by 3:
171,642,815 ÷ 3 = 57,214,271.6667
If the quotient is a whole number, then 3 and 57,214,271.6667 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 | 171,642,815 | |
| -1 | -171,642,815 |
Let's try dividing by 4:
171,642,815 ÷ 4 = 42,910,703.75
If the quotient is a whole number, then 4 and 42,910,703.75 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 | 171,642,815 | |
| -1 | 171,642,815 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 37 | 155 | 173 | 185 | 865 | 1,147 | 5,363 | 5,735 | 6,401 | 26,815 | 29,929 | 32,005 | 149,645 | 198,431 | 927,799 | 992,155 | 1,107,373 | 4,638,995 | 5,536,865 | 34,328,563 | 171,642,815 |
| -1 | -5 | -31 | -37 | -155 | -173 | -185 | -865 | -1,147 | -5,363 | -5,735 | -6,401 | -26,815 | -29,929 | -32,005 | -149,645 | -198,431 | -927,799 | -992,155 | -1,107,373 | -4,638,995 | -5,536,865 | -34,328,563 | -171,642,815 |
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