A:
Positive:
1 x 1281328113 x 98563747 x 27262367 x 191243313 x 40937611 x 20971871 x 147113149 x 4069
Negative:
-1 x -12813281-13 x -985637-47 x -272623-67 x -191243-313 x -40937-611 x -20971-871 x -14711-3149 x -4069
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 12,813,281, 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 | 12,813,281 | |
| -1 | -12,813,281 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,813,281.
Example:
1 x 12,813,281 = 12,813,281
and
-1 x -12,813,281 = 12,813,281
Notice both answers equal 12,813,281
With that explanation out of the way, let's continue. Next, we take the number 12,813,281 and divide it by 2:
12,813,281 ÷ 2 = 6,406,640.5
If the quotient is a whole number, then 2 and 6,406,640.5 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 | 12,813,281 | |
| -1 | -12,813,281 |
Now, we try dividing 12,813,281 by 3:
12,813,281 ÷ 3 = 4,271,093.6667
If the quotient is a whole number, then 3 and 4,271,093.6667 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 | 12,813,281 | |
| -1 | -12,813,281 |
Let's try dividing by 4:
12,813,281 ÷ 4 = 3,203,320.25
If the quotient is a whole number, then 4 and 3,203,320.25 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 | 12,813,281 | |
| -1 | 12,813,281 |
If you did it right, you will end up with this table:
| 1 | 13 | 47 | 67 | 313 | 611 | 871 | 3,149 | 4,069 | 14,711 | 20,971 | 40,937 | 191,243 | 272,623 | 985,637 | 12,813,281 |
| -1 | -13 | -47 | -67 | -313 | -611 | -871 | -3,149 | -4,069 | -14,711 | -20,971 | -40,937 | -191,243 | -272,623 | -985,637 | -12,813,281 |
Here are some more numbers to try:
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