A:
Positive:
1 x 388670155 x 777340311 x 353336517 x 228629555 x 70667385 x 457259121 x 321215187 x 207845605 x 64243935 x 415692057 x 188953779 x 10285
Negative:
-1 x -38867015-5 x -7773403-11 x -3533365-17 x -2286295-55 x -706673-85 x -457259-121 x -321215-187 x -207845-605 x -64243-935 x -41569-2057 x -18895-3779 x -10285
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 38,867,015, 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 | 38,867,015 | |
| -1 | -38,867,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,867,015.
Example:
1 x 38,867,015 = 38,867,015
and
-1 x -38,867,015 = 38,867,015
Notice both answers equal 38,867,015
With that explanation out of the way, let's continue. Next, we take the number 38,867,015 and divide it by 2:
38,867,015 ÷ 2 = 19,433,507.5
If the quotient is a whole number, then 2 and 19,433,507.5 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 | 38,867,015 | |
| -1 | -38,867,015 |
Now, we try dividing 38,867,015 by 3:
38,867,015 ÷ 3 = 12,955,671.6667
If the quotient is a whole number, then 3 and 12,955,671.6667 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 | 38,867,015 | |
| -1 | -38,867,015 |
Let's try dividing by 4:
38,867,015 ÷ 4 = 9,716,753.75
If the quotient is a whole number, then 4 and 9,716,753.75 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 | 38,867,015 | |
| -1 | 38,867,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 17 | 55 | 85 | 121 | 187 | 605 | 935 | 2,057 | 3,779 | 10,285 | 18,895 | 41,569 | 64,243 | 207,845 | 321,215 | 457,259 | 706,673 | 2,286,295 | 3,533,365 | 7,773,403 | 38,867,015 |
| -1 | -5 | -11 | -17 | -55 | -85 | -121 | -187 | -605 | -935 | -2,057 | -3,779 | -10,285 | -18,895 | -41,569 | -64,243 | -207,845 | -321,215 | -457,259 | -706,673 | -2,286,295 | -3,533,365 | -7,773,403 | -38,867,015 |
Here are some more numbers to try:
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