A:
Positive:
1 x 3097587119 x 163030923 x 134677773 x 424327437 x 70883971 x 319011387 x 223331679 x 18449
Negative:
-1 x -30975871-19 x -1630309-23 x -1346777-73 x -424327-437 x -70883-971 x -31901-1387 x -22333-1679 x -18449
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 30,975,871, 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 | 30,975,871 | |
| -1 | -30,975,871 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,975,871.
Example:
1 x 30,975,871 = 30,975,871
and
-1 x -30,975,871 = 30,975,871
Notice both answers equal 30,975,871
With that explanation out of the way, let's continue. Next, we take the number 30,975,871 and divide it by 2:
30,975,871 ÷ 2 = 15,487,935.5
If the quotient is a whole number, then 2 and 15,487,935.5 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 | 30,975,871 | |
| -1 | -30,975,871 |
Now, we try dividing 30,975,871 by 3:
30,975,871 ÷ 3 = 10,325,290.3333
If the quotient is a whole number, then 3 and 10,325,290.3333 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 | 30,975,871 | |
| -1 | -30,975,871 |
Let's try dividing by 4:
30,975,871 ÷ 4 = 7,743,967.75
If the quotient is a whole number, then 4 and 7,743,967.75 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 | 30,975,871 | |
| -1 | 30,975,871 |
If you did it right, you will end up with this table:
| 1 | 19 | 23 | 73 | 437 | 971 | 1,387 | 1,679 | 18,449 | 22,333 | 31,901 | 70,883 | 424,327 | 1,346,777 | 1,630,309 | 30,975,871 |
| -1 | -19 | -23 | -73 | -437 | -971 | -1,387 | -1,679 | -18,449 | -22,333 | -31,901 | -70,883 | -424,327 | -1,346,777 | -1,630,309 | -30,975,871 |
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