A:
Positive:
1 x 1316666455 x 2633332911 x 1196969543 x 306201555 x 2393939215 x 612403473 x 2783652365 x 55673
Negative:
-1 x -131666645-5 x -26333329-11 x -11969695-43 x -3062015-55 x -2393939-215 x -612403-473 x -278365-2365 x -55673
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 131,666,645, 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 | 131,666,645 | |
| -1 | -131,666,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 131,666,645.
Example:
1 x 131,666,645 = 131,666,645
and
-1 x -131,666,645 = 131,666,645
Notice both answers equal 131,666,645
With that explanation out of the way, let's continue. Next, we take the number 131,666,645 and divide it by 2:
131,666,645 ÷ 2 = 65,833,322.5
If the quotient is a whole number, then 2 and 65,833,322.5 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 | 131,666,645 | |
| -1 | -131,666,645 |
Now, we try dividing 131,666,645 by 3:
131,666,645 ÷ 3 = 43,888,881.6667
If the quotient is a whole number, then 3 and 43,888,881.6667 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 | 131,666,645 | |
| -1 | -131,666,645 |
Let's try dividing by 4:
131,666,645 ÷ 4 = 32,916,661.25
If the quotient is a whole number, then 4 and 32,916,661.25 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 | 131,666,645 | |
| -1 | 131,666,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 43 | 55 | 215 | 473 | 2,365 | 55,673 | 278,365 | 612,403 | 2,393,939 | 3,062,015 | 11,969,695 | 26,333,329 | 131,666,645 |
| -1 | -5 | -11 | -43 | -55 | -215 | -473 | -2,365 | -55,673 | -278,365 | -612,403 | -2,393,939 | -3,062,015 | -11,969,695 | -26,333,329 | -131,666,645 |
Here are some more numbers to try:
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