A:
Positive:
1 x 388903137 x 555575911 x 353548377 x 505069157 x 2477091099 x 353871727 x 225193217 x 12089
Negative:
-1 x -38890313-7 x -5555759-11 x -3535483-77 x -505069-157 x -247709-1099 x -35387-1727 x -22519-3217 x -12089
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 38,890,313, 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 | 38,890,313 | |
| -1 | -38,890,313 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,890,313.
Example:
1 x 38,890,313 = 38,890,313
and
-1 x -38,890,313 = 38,890,313
Notice both answers equal 38,890,313
With that explanation out of the way, let's continue. Next, we take the number 38,890,313 and divide it by 2:
38,890,313 ÷ 2 = 19,445,156.5
If the quotient is a whole number, then 2 and 19,445,156.5 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 | 38,890,313 | |
| -1 | -38,890,313 |
Now, we try dividing 38,890,313 by 3:
38,890,313 ÷ 3 = 12,963,437.6667
If the quotient is a whole number, then 3 and 12,963,437.6667 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 | 38,890,313 | |
| -1 | -38,890,313 |
Let's try dividing by 4:
38,890,313 ÷ 4 = 9,722,578.25
If the quotient is a whole number, then 4 and 9,722,578.25 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 | 38,890,313 | |
| -1 | 38,890,313 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 157 | 1,099 | 1,727 | 3,217 | 12,089 | 22,519 | 35,387 | 247,709 | 505,069 | 3,535,483 | 5,555,759 | 38,890,313 |
| -1 | -7 | -11 | -77 | -157 | -1,099 | -1,727 | -3,217 | -12,089 | -22,519 | -35,387 | -247,709 | -505,069 | -3,535,483 | -5,555,759 | -38,890,313 |
Here are some more numbers to try:
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