A:
Positive:
1 x 3820722113 x 293901731 x 1232491113 x 338117403 x 94807839 x 455391469 x 260093503 x 10907
Negative:
-1 x -38207221-13 x -2939017-31 x -1232491-113 x -338117-403 x -94807-839 x -45539-1469 x -26009-3503 x -10907
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 38,207,221, 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 | 38,207,221 | |
| -1 | -38,207,221 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,207,221.
Example:
1 x 38,207,221 = 38,207,221
and
-1 x -38,207,221 = 38,207,221
Notice both answers equal 38,207,221
With that explanation out of the way, let's continue. Next, we take the number 38,207,221 and divide it by 2:
38,207,221 ÷ 2 = 19,103,610.5
If the quotient is a whole number, then 2 and 19,103,610.5 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 | 38,207,221 | |
| -1 | -38,207,221 |
Now, we try dividing 38,207,221 by 3:
38,207,221 ÷ 3 = 12,735,740.3333
If the quotient is a whole number, then 3 and 12,735,740.3333 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 | 38,207,221 | |
| -1 | -38,207,221 |
Let's try dividing by 4:
38,207,221 ÷ 4 = 9,551,805.25
If the quotient is a whole number, then 4 and 9,551,805.25 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 | 38,207,221 | |
| -1 | 38,207,221 |
If you did it right, you will end up with this table:
| 1 | 13 | 31 | 113 | 403 | 839 | 1,469 | 3,503 | 10,907 | 26,009 | 45,539 | 94,807 | 338,117 | 1,232,491 | 2,939,017 | 38,207,221 |
| -1 | -13 | -31 | -113 | -403 | -839 | -1,469 | -3,503 | -10,907 | -26,009 | -45,539 | -94,807 | -338,117 | -1,232,491 | -2,939,017 | -38,207,221 |
Here are some more numbers to try:
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