A:
Positive:
1 x 3157256311 x 287023361 x 517583211 x 149633223 x 141581671 x 470532321 x 136032453 x 12871
Negative:
-1 x -31572563-11 x -2870233-61 x -517583-211 x -149633-223 x -141581-671 x -47053-2321 x -13603-2453 x -12871
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 31,572,563, 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 | 31,572,563 | |
| -1 | -31,572,563 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,572,563.
Example:
1 x 31,572,563 = 31,572,563
and
-1 x -31,572,563 = 31,572,563
Notice both answers equal 31,572,563
With that explanation out of the way, let's continue. Next, we take the number 31,572,563 and divide it by 2:
31,572,563 ÷ 2 = 15,786,281.5
If the quotient is a whole number, then 2 and 15,786,281.5 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 | 31,572,563 | |
| -1 | -31,572,563 |
Now, we try dividing 31,572,563 by 3:
31,572,563 ÷ 3 = 10,524,187.6667
If the quotient is a whole number, then 3 and 10,524,187.6667 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 | 31,572,563 | |
| -1 | -31,572,563 |
Let's try dividing by 4:
31,572,563 ÷ 4 = 7,893,140.75
If the quotient is a whole number, then 4 and 7,893,140.75 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 | 31,572,563 | |
| -1 | 31,572,563 |
If you did it right, you will end up with this table:
| 1 | 11 | 61 | 211 | 223 | 671 | 2,321 | 2,453 | 12,871 | 13,603 | 47,053 | 141,581 | 149,633 | 517,583 | 2,870,233 | 31,572,563 |
| -1 | -11 | -61 | -211 | -223 | -671 | -2,321 | -2,453 | -12,871 | -13,603 | -47,053 | -141,581 | -149,633 | -517,583 | -2,870,233 | -31,572,563 |
Here are some more numbers to try:
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