A:
Positive:
1 x 2873113111 x 261192113 x 2210087143 x 200917331 x 86801607 x 473333641 x 78914303 x 6677
Negative:
-1 x -28731131-11 x -2611921-13 x -2210087-143 x -200917-331 x -86801-607 x -47333-3641 x -7891-4303 x -6677
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 28,731,131, 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 | 28,731,131 | |
| -1 | -28,731,131 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,731,131.
Example:
1 x 28,731,131 = 28,731,131
and
-1 x -28,731,131 = 28,731,131
Notice both answers equal 28,731,131
With that explanation out of the way, let's continue. Next, we take the number 28,731,131 and divide it by 2:
28,731,131 ÷ 2 = 14,365,565.5
If the quotient is a whole number, then 2 and 14,365,565.5 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 | 28,731,131 | |
| -1 | -28,731,131 |
Now, we try dividing 28,731,131 by 3:
28,731,131 ÷ 3 = 9,577,043.6667
If the quotient is a whole number, then 3 and 9,577,043.6667 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 | 28,731,131 | |
| -1 | -28,731,131 |
Let's try dividing by 4:
28,731,131 ÷ 4 = 7,182,782.75
If the quotient is a whole number, then 4 and 7,182,782.75 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 | 28,731,131 | |
| -1 | 28,731,131 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 143 | 331 | 607 | 3,641 | 4,303 | 6,677 | 7,891 | 47,333 | 86,801 | 200,917 | 2,210,087 | 2,611,921 | 28,731,131 |
| -1 | -11 | -13 | -143 | -331 | -607 | -3,641 | -4,303 | -6,677 | -7,891 | -47,333 | -86,801 | -200,917 | -2,210,087 | -2,611,921 | -28,731,131 |
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