A:
Positive:
1 x 3120457117 x 183556371 x 439501103 x 302957251 x 1243211207 x 258531751 x 178214267 x 7313
Negative:
-1 x -31204571-17 x -1835563-71 x -439501-103 x -302957-251 x -124321-1207 x -25853-1751 x -17821-4267 x -7313
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 31,204,571, 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 | 31,204,571 | |
| -1 | -31,204,571 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,204,571.
Example:
1 x 31,204,571 = 31,204,571
and
-1 x -31,204,571 = 31,204,571
Notice both answers equal 31,204,571
With that explanation out of the way, let's continue. Next, we take the number 31,204,571 and divide it by 2:
31,204,571 ÷ 2 = 15,602,285.5
If the quotient is a whole number, then 2 and 15,602,285.5 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 | 31,204,571 | |
| -1 | -31,204,571 |
Now, we try dividing 31,204,571 by 3:
31,204,571 ÷ 3 = 10,401,523.6667
If the quotient is a whole number, then 3 and 10,401,523.6667 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 | 31,204,571 | |
| -1 | -31,204,571 |
Let's try dividing by 4:
31,204,571 ÷ 4 = 7,801,142.75
If the quotient is a whole number, then 4 and 7,801,142.75 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 | 31,204,571 | |
| -1 | 31,204,571 |
If you did it right, you will end up with this table:
| 1 | 17 | 71 | 103 | 251 | 1,207 | 1,751 | 4,267 | 7,313 | 17,821 | 25,853 | 124,321 | 302,957 | 439,501 | 1,835,563 | 31,204,571 |
| -1 | -17 | -71 | -103 | -251 | -1,207 | -1,751 | -4,267 | -7,313 | -17,821 | -25,853 | -124,321 | -302,957 | -439,501 | -1,835,563 | -31,204,571 |
Here are some more numbers to try:
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