A:
Positive:
1 x 1388638911 x 126239929 x 478841101 x 137489319 x 43531431 x 322191111 x 124992929 x 4741
Negative:
-1 x -13886389-11 x -1262399-29 x -478841-101 x -137489-319 x -43531-431 x -32219-1111 x -12499-2929 x -4741
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 13,886,389, 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 | 13,886,389 | |
| -1 | -13,886,389 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,886,389.
Example:
1 x 13,886,389 = 13,886,389
and
-1 x -13,886,389 = 13,886,389
Notice both answers equal 13,886,389
With that explanation out of the way, let's continue. Next, we take the number 13,886,389 and divide it by 2:
13,886,389 ÷ 2 = 6,943,194.5
If the quotient is a whole number, then 2 and 6,943,194.5 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 | 13,886,389 | |
| -1 | -13,886,389 |
Now, we try dividing 13,886,389 by 3:
13,886,389 ÷ 3 = 4,628,796.3333
If the quotient is a whole number, then 3 and 4,628,796.3333 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 | 13,886,389 | |
| -1 | -13,886,389 |
Let's try dividing by 4:
13,886,389 ÷ 4 = 3,471,597.25
If the quotient is a whole number, then 4 and 3,471,597.25 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 | 13,886,389 | |
| -1 | 13,886,389 |
If you did it right, you will end up with this table:
| 1 | 11 | 29 | 101 | 319 | 431 | 1,111 | 2,929 | 4,741 | 12,499 | 32,219 | 43,531 | 137,489 | 478,841 | 1,262,399 | 13,886,389 |
| -1 | -11 | -29 | -101 | -319 | -431 | -1,111 | -2,929 | -4,741 | -12,499 | -32,219 | -43,531 | -137,489 | -478,841 | -1,262,399 | -13,886,389 |
Here are some more numbers to try:
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