A:
Positive:
1 x 1263817319 x 66516731 x 40768343 x 293911499 x 25327589 x 21457817 x 154691333 x 9481
Negative:
-1 x -12638173-19 x -665167-31 x -407683-43 x -293911-499 x -25327-589 x -21457-817 x -15469-1333 x -9481
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 12,638,173, 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 | 12,638,173 | |
| -1 | -12,638,173 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,638,173.
Example:
1 x 12,638,173 = 12,638,173
and
-1 x -12,638,173 = 12,638,173
Notice both answers equal 12,638,173
With that explanation out of the way, let's continue. Next, we take the number 12,638,173 and divide it by 2:
12,638,173 ÷ 2 = 6,319,086.5
If the quotient is a whole number, then 2 and 6,319,086.5 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 | 12,638,173 | |
| -1 | -12,638,173 |
Now, we try dividing 12,638,173 by 3:
12,638,173 ÷ 3 = 4,212,724.3333
If the quotient is a whole number, then 3 and 4,212,724.3333 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 | 12,638,173 | |
| -1 | -12,638,173 |
Let's try dividing by 4:
12,638,173 ÷ 4 = 3,159,543.25
If the quotient is a whole number, then 4 and 3,159,543.25 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 | 12,638,173 | |
| -1 | 12,638,173 |
If you did it right, you will end up with this table:
| 1 | 19 | 31 | 43 | 499 | 589 | 817 | 1,333 | 9,481 | 15,469 | 21,457 | 25,327 | 293,911 | 407,683 | 665,167 | 12,638,173 |
| -1 | -19 | -31 | -43 | -499 | -589 | -817 | -1,333 | -9,481 | -15,469 | -21,457 | -25,327 | -293,911 | -407,683 | -665,167 | -12,638,173 |
Here are some more numbers to try:
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