A:
Positive:
1 x 1211778711 x 110161717 x 71281143 x 281809121 x 100147137 x 88451187 x 64801473 x 25619731 x 165771507 x 80412057 x 58912329 x 5203
Negative:
-1 x -12117787-11 x -1101617-17 x -712811-43 x -281809-121 x -100147-137 x -88451-187 x -64801-473 x -25619-731 x -16577-1507 x -8041-2057 x -5891-2329 x -5203
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 12,117,787, 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 | 12,117,787 | |
| -1 | -12,117,787 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,117,787.
Example:
1 x 12,117,787 = 12,117,787
and
-1 x -12,117,787 = 12,117,787
Notice both answers equal 12,117,787
With that explanation out of the way, let's continue. Next, we take the number 12,117,787 and divide it by 2:
12,117,787 ÷ 2 = 6,058,893.5
If the quotient is a whole number, then 2 and 6,058,893.5 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 | 12,117,787 | |
| -1 | -12,117,787 |
Now, we try dividing 12,117,787 by 3:
12,117,787 ÷ 3 = 4,039,262.3333
If the quotient is a whole number, then 3 and 4,039,262.3333 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 | 12,117,787 | |
| -1 | -12,117,787 |
Let's try dividing by 4:
12,117,787 ÷ 4 = 3,029,446.75
If the quotient is a whole number, then 4 and 3,029,446.75 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 | 12,117,787 | |
| -1 | 12,117,787 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 43 | 121 | 137 | 187 | 473 | 731 | 1,507 | 2,057 | 2,329 | 5,203 | 5,891 | 8,041 | 16,577 | 25,619 | 64,801 | 88,451 | 100,147 | 281,809 | 712,811 | 1,101,617 | 12,117,787 |
| -1 | -11 | -17 | -43 | -121 | -137 | -187 | -473 | -731 | -1,507 | -2,057 | -2,329 | -5,203 | -5,891 | -8,041 | -16,577 | -25,619 | -64,801 | -88,451 | -100,147 | -281,809 | -712,811 | -1,101,617 | -12,117,787 |
Here are some more numbers to try:
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