A:
Positive:
1 x 1890331311 x 171848313 x 145410167 x 282139143 x 132191737 x 25649871 x 217031973 x 9581
Negative:
-1 x -18903313-11 x -1718483-13 x -1454101-67 x -282139-143 x -132191-737 x -25649-871 x -21703-1973 x -9581
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 18,903,313, 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 | 18,903,313 | |
| -1 | -18,903,313 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,903,313.
Example:
1 x 18,903,313 = 18,903,313
and
-1 x -18,903,313 = 18,903,313
Notice both answers equal 18,903,313
With that explanation out of the way, let's continue. Next, we take the number 18,903,313 and divide it by 2:
18,903,313 ÷ 2 = 9,451,656.5
If the quotient is a whole number, then 2 and 9,451,656.5 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 | 18,903,313 | |
| -1 | -18,903,313 |
Now, we try dividing 18,903,313 by 3:
18,903,313 ÷ 3 = 6,301,104.3333
If the quotient is a whole number, then 3 and 6,301,104.3333 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 | 18,903,313 | |
| -1 | -18,903,313 |
Let's try dividing by 4:
18,903,313 ÷ 4 = 4,725,828.25
If the quotient is a whole number, then 4 and 4,725,828.25 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 | 18,903,313 | |
| -1 | 18,903,313 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 67 | 143 | 737 | 871 | 1,973 | 9,581 | 21,703 | 25,649 | 132,191 | 282,139 | 1,454,101 | 1,718,483 | 18,903,313 |
| -1 | -11 | -13 | -67 | -143 | -737 | -871 | -1,973 | -9,581 | -21,703 | -25,649 | -132,191 | -282,139 | -1,454,101 | -1,718,483 | -18,903,313 |
Here are some more numbers to try:
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