A:
Positive:
1 x 231878155 x 46375637 x 331254535 x 662509241 x 962151205 x 192431687 x 137452749 x 8435
Negative:
-1 x -23187815-5 x -4637563-7 x -3312545-35 x -662509-241 x -96215-1205 x -19243-1687 x -13745-2749 x -8435
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 23,187,815, 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 | 23,187,815 | |
| -1 | -23,187,815 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 23,187,815.
Example:
1 x 23,187,815 = 23,187,815
and
-1 x -23,187,815 = 23,187,815
Notice both answers equal 23,187,815
With that explanation out of the way, let's continue. Next, we take the number 23,187,815 and divide it by 2:
23,187,815 ÷ 2 = 11,593,907.5
If the quotient is a whole number, then 2 and 11,593,907.5 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 | 23,187,815 | |
| -1 | -23,187,815 |
Now, we try dividing 23,187,815 by 3:
23,187,815 ÷ 3 = 7,729,271.6667
If the quotient is a whole number, then 3 and 7,729,271.6667 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 | 23,187,815 | |
| -1 | -23,187,815 |
Let's try dividing by 4:
23,187,815 ÷ 4 = 5,796,953.75
If the quotient is a whole number, then 4 and 5,796,953.75 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 | 23,187,815 | |
| -1 | 23,187,815 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 241 | 1,205 | 1,687 | 2,749 | 8,435 | 13,745 | 19,243 | 96,215 | 662,509 | 3,312,545 | 4,637,563 | 23,187,815 |
| -1 | -5 | -7 | -35 | -241 | -1,205 | -1,687 | -2,749 | -8,435 | -13,745 | -19,243 | -96,215 | -662,509 | -3,312,545 | -4,637,563 | -23,187,815 |
Here are some more numbers to try:
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