A:
Positive:
1 x 3926698113 x 302053761 x 643721169 x 232349293 x 134017793 x 495172197 x 178733809 x 10309
Negative:
-1 x -39266981-13 x -3020537-61 x -643721-169 x -232349-293 x -134017-793 x -49517-2197 x -17873-3809 x -10309
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 39,266,981, 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 | 39,266,981 | |
| -1 | -39,266,981 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 39,266,981.
Example:
1 x 39,266,981 = 39,266,981
and
-1 x -39,266,981 = 39,266,981
Notice both answers equal 39,266,981
With that explanation out of the way, let's continue. Next, we take the number 39,266,981 and divide it by 2:
39,266,981 ÷ 2 = 19,633,490.5
If the quotient is a whole number, then 2 and 19,633,490.5 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 | 39,266,981 | |
| -1 | -39,266,981 |
Now, we try dividing 39,266,981 by 3:
39,266,981 ÷ 3 = 13,088,993.6667
If the quotient is a whole number, then 3 and 13,088,993.6667 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 | 39,266,981 | |
| -1 | -39,266,981 |
Let's try dividing by 4:
39,266,981 ÷ 4 = 9,816,745.25
If the quotient is a whole number, then 4 and 9,816,745.25 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 | 39,266,981 | |
| -1 | 39,266,981 |
If you did it right, you will end up with this table:
| 1 | 13 | 61 | 169 | 293 | 793 | 2,197 | 3,809 | 10,309 | 17,873 | 49,517 | 134,017 | 232,349 | 643,721 | 3,020,537 | 39,266,981 |
| -1 | -13 | -61 | -169 | -293 | -793 | -2,197 | -3,809 | -10,309 | -17,873 | -49,517 | -134,017 | -232,349 | -643,721 | -3,020,537 | -39,266,981 |
Here are some more numbers to try:
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