A:
Positive:
1 x 388776855 x 77755377 x 555395511 x 353433535 x 111079155 x 70686777 x 504905385 x 100981
Negative:
-1 x -38877685-5 x -7775537-7 x -5553955-11 x -3534335-35 x -1110791-55 x -706867-77 x -504905-385 x -100981
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 38,877,685, 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 | 38,877,685 | |
| -1 | -38,877,685 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,877,685.
Example:
1 x 38,877,685 = 38,877,685
and
-1 x -38,877,685 = 38,877,685
Notice both answers equal 38,877,685
With that explanation out of the way, let's continue. Next, we take the number 38,877,685 and divide it by 2:
38,877,685 ÷ 2 = 19,438,842.5
If the quotient is a whole number, then 2 and 19,438,842.5 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 | 38,877,685 | |
| -1 | -38,877,685 |
Now, we try dividing 38,877,685 by 3:
38,877,685 ÷ 3 = 12,959,228.3333
If the quotient is a whole number, then 3 and 12,959,228.3333 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 | 38,877,685 | |
| -1 | -38,877,685 |
Let's try dividing by 4:
38,877,685 ÷ 4 = 9,719,421.25
If the quotient is a whole number, then 4 and 9,719,421.25 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 | 38,877,685 | |
| -1 | 38,877,685 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 385 | 100,981 | 504,905 | 706,867 | 1,110,791 | 3,534,335 | 5,553,955 | 7,775,537 | 38,877,685 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -385 | -100,981 | -504,905 | -706,867 | -1,110,791 | -3,534,335 | -5,553,955 | -7,775,537 | -38,877,685 |
Here are some more numbers to try:
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