A:
Positive:
1 x 132404097 x 189148713 x 101849383 x 15952391 x 145499581 x 227891079 x 122711753 x 7553
Negative:
-1 x -13240409-7 x -1891487-13 x -1018493-83 x -159523-91 x -145499-581 x -22789-1079 x -12271-1753 x -7553
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 13,240,409, 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 | 13,240,409 | |
| -1 | -13,240,409 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,240,409.
Example:
1 x 13,240,409 = 13,240,409
and
-1 x -13,240,409 = 13,240,409
Notice both answers equal 13,240,409
With that explanation out of the way, let's continue. Next, we take the number 13,240,409 and divide it by 2:
13,240,409 ÷ 2 = 6,620,204.5
If the quotient is a whole number, then 2 and 6,620,204.5 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 | 13,240,409 | |
| -1 | -13,240,409 |
Now, we try dividing 13,240,409 by 3:
13,240,409 ÷ 3 = 4,413,469.6667
If the quotient is a whole number, then 3 and 4,413,469.6667 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 | 13,240,409 | |
| -1 | -13,240,409 |
Let's try dividing by 4:
13,240,409 ÷ 4 = 3,310,102.25
If the quotient is a whole number, then 4 and 3,310,102.25 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 | 13,240,409 | |
| -1 | 13,240,409 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 83 | 91 | 581 | 1,079 | 1,753 | 7,553 | 12,271 | 22,789 | 145,499 | 159,523 | 1,018,493 | 1,891,487 | 13,240,409 |
| -1 | -7 | -13 | -83 | -91 | -581 | -1,079 | -1,753 | -7,553 | -12,271 | -22,789 | -145,499 | -159,523 | -1,018,493 | -1,891,487 | -13,240,409 |
Here are some more numbers to try:
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