A:
Positive:
1 x 2812447131 x 90724147 x 59839397 x 289943199 x 1413291457 x 193033007 x 93534559 x 6169
Negative:
-1 x -28124471-31 x -907241-47 x -598393-97 x -289943-199 x -141329-1457 x -19303-3007 x -9353-4559 x -6169
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 28,124,471, 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 | 28,124,471 | |
| -1 | -28,124,471 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,124,471.
Example:
1 x 28,124,471 = 28,124,471
and
-1 x -28,124,471 = 28,124,471
Notice both answers equal 28,124,471
With that explanation out of the way, let's continue. Next, we take the number 28,124,471 and divide it by 2:
28,124,471 ÷ 2 = 14,062,235.5
If the quotient is a whole number, then 2 and 14,062,235.5 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 | 28,124,471 | |
| -1 | -28,124,471 |
Now, we try dividing 28,124,471 by 3:
28,124,471 ÷ 3 = 9,374,823.6667
If the quotient is a whole number, then 3 and 9,374,823.6667 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 | 28,124,471 | |
| -1 | -28,124,471 |
Let's try dividing by 4:
28,124,471 ÷ 4 = 7,031,117.75
If the quotient is a whole number, then 4 and 7,031,117.75 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 | 28,124,471 | |
| -1 | 28,124,471 |
If you did it right, you will end up with this table:
| 1 | 31 | 47 | 97 | 199 | 1,457 | 3,007 | 4,559 | 6,169 | 9,353 | 19,303 | 141,329 | 289,943 | 598,393 | 907,241 | 28,124,471 |
| -1 | -31 | -47 | -97 | -199 | -1,457 | -3,007 | -4,559 | -6,169 | -9,353 | -19,303 | -141,329 | -289,943 | -598,393 | -907,241 | -28,124,471 |
Here are some more numbers to try:
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