A:
Positive:
1 x 387674217 x 553820311 x 352431177 x 50347389 x 435589623 x 62227979 x 395995657 x 6853
Negative:
-1 x -38767421-7 x -5538203-11 x -3524311-77 x -503473-89 x -435589-623 x -62227-979 x -39599-5657 x -6853
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 38,767,421, 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 | 38,767,421 | |
| -1 | -38,767,421 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,767,421.
Example:
1 x 38,767,421 = 38,767,421
and
-1 x -38,767,421 = 38,767,421
Notice both answers equal 38,767,421
With that explanation out of the way, let's continue. Next, we take the number 38,767,421 and divide it by 2:
38,767,421 ÷ 2 = 19,383,710.5
If the quotient is a whole number, then 2 and 19,383,710.5 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 | 38,767,421 | |
| -1 | -38,767,421 |
Now, we try dividing 38,767,421 by 3:
38,767,421 ÷ 3 = 12,922,473.6667
If the quotient is a whole number, then 3 and 12,922,473.6667 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 | 38,767,421 | |
| -1 | -38,767,421 |
Let's try dividing by 4:
38,767,421 ÷ 4 = 9,691,855.25
If the quotient is a whole number, then 4 and 9,691,855.25 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 | 38,767,421 | |
| -1 | 38,767,421 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 89 | 623 | 979 | 5,657 | 6,853 | 39,599 | 62,227 | 435,589 | 503,473 | 3,524,311 | 5,538,203 | 38,767,421 |
| -1 | -7 | -11 | -77 | -89 | -623 | -979 | -5,657 | -6,853 | -39,599 | -62,227 | -435,589 | -503,473 | -3,524,311 | -5,538,203 | -38,767,421 |
Here are some more numbers to try:
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