A:
Positive:
1 x 12846258113 x 9881737113 x 1136837157 x 818233557 x 2306331469 x 874492041 x 629417241 x 17741
Negative:
-1 x -128462581-13 x -9881737-113 x -1136837-157 x -818233-557 x -230633-1469 x -87449-2041 x -62941-7241 x -17741
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 128,462,581, 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 | 128,462,581 | |
| -1 | -128,462,581 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 128,462,581.
Example:
1 x 128,462,581 = 128,462,581
and
-1 x -128,462,581 = 128,462,581
Notice both answers equal 128,462,581
With that explanation out of the way, let's continue. Next, we take the number 128,462,581 and divide it by 2:
128,462,581 ÷ 2 = 64,231,290.5
If the quotient is a whole number, then 2 and 64,231,290.5 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 | 128,462,581 | |
| -1 | -128,462,581 |
Now, we try dividing 128,462,581 by 3:
128,462,581 ÷ 3 = 42,820,860.3333
If the quotient is a whole number, then 3 and 42,820,860.3333 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 | 128,462,581 | |
| -1 | -128,462,581 |
Let's try dividing by 4:
128,462,581 ÷ 4 = 32,115,645.25
If the quotient is a whole number, then 4 and 32,115,645.25 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 | 128,462,581 | |
| -1 | 128,462,581 |
If you did it right, you will end up with this table:
| 1 | 13 | 113 | 157 | 557 | 1,469 | 2,041 | 7,241 | 17,741 | 62,941 | 87,449 | 230,633 | 818,233 | 1,136,837 | 9,881,737 | 128,462,581 |
| -1 | -13 | -113 | -157 | -557 | -1,469 | -2,041 | -7,241 | -17,741 | -62,941 | -87,449 | -230,633 | -818,233 | -1,136,837 | -9,881,737 | -128,462,581 |
Here are some more numbers to try:
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