A:
Positive:
1 x 312018955 x 624037919 x 164220553 x 58871595 x 328441265 x 1177431007 x 309855035 x 6197
Negative:
-1 x -31201895-5 x -6240379-19 x -1642205-53 x -588715-95 x -328441-265 x -117743-1007 x -30985-5035 x -6197
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 31,201,895, 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 | 31,201,895 | |
| -1 | -31,201,895 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,201,895.
Example:
1 x 31,201,895 = 31,201,895
and
-1 x -31,201,895 = 31,201,895
Notice both answers equal 31,201,895
With that explanation out of the way, let's continue. Next, we take the number 31,201,895 and divide it by 2:
31,201,895 ÷ 2 = 15,600,947.5
If the quotient is a whole number, then 2 and 15,600,947.5 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 | 31,201,895 | |
| -1 | -31,201,895 |
Now, we try dividing 31,201,895 by 3:
31,201,895 ÷ 3 = 10,400,631.6667
If the quotient is a whole number, then 3 and 10,400,631.6667 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 | 31,201,895 | |
| -1 | -31,201,895 |
Let's try dividing by 4:
31,201,895 ÷ 4 = 7,800,473.75
If the quotient is a whole number, then 4 and 7,800,473.75 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 | 31,201,895 | |
| -1 | 31,201,895 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 53 | 95 | 265 | 1,007 | 5,035 | 6,197 | 30,985 | 117,743 | 328,441 | 588,715 | 1,642,205 | 6,240,379 | 31,201,895 |
| -1 | -5 | -19 | -53 | -95 | -265 | -1,007 | -5,035 | -6,197 | -30,985 | -117,743 | -328,441 | -588,715 | -1,642,205 | -6,240,379 | -31,201,895 |
Here are some more numbers to try:
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