A:
Positive:
1 x 3925879111 x 356898113 x 3019907143 x 274537281 x 139711977 x 401833091 x 127013653 x 10747
Negative:
-1 x -39258791-11 x -3568981-13 x -3019907-143 x -274537-281 x -139711-977 x -40183-3091 x -12701-3653 x -10747
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 39,258,791, 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 | 39,258,791 | |
| -1 | -39,258,791 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 39,258,791.
Example:
1 x 39,258,791 = 39,258,791
and
-1 x -39,258,791 = 39,258,791
Notice both answers equal 39,258,791
With that explanation out of the way, let's continue. Next, we take the number 39,258,791 and divide it by 2:
39,258,791 ÷ 2 = 19,629,395.5
If the quotient is a whole number, then 2 and 19,629,395.5 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 | 39,258,791 | |
| -1 | -39,258,791 |
Now, we try dividing 39,258,791 by 3:
39,258,791 ÷ 3 = 13,086,263.6667
If the quotient is a whole number, then 3 and 13,086,263.6667 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 | 39,258,791 | |
| -1 | -39,258,791 |
Let's try dividing by 4:
39,258,791 ÷ 4 = 9,814,697.75
If the quotient is a whole number, then 4 and 9,814,697.75 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 | 39,258,791 | |
| -1 | 39,258,791 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 143 | 281 | 977 | 3,091 | 3,653 | 10,747 | 12,701 | 40,183 | 139,711 | 274,537 | 3,019,907 | 3,568,981 | 39,258,791 |
| -1 | -11 | -13 | -143 | -281 | -977 | -3,091 | -3,653 | -10,747 | -12,701 | -40,183 | -139,711 | -274,537 | -3,019,907 | -3,568,981 | -39,258,791 |
Here are some more numbers to try:
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