A:
Positive:
1 x 1970970719 x 103735331 x 635797109 x 180823307 x 64201589 x 334632071 x 95173379 x 5833
Negative:
-1 x -19709707-19 x -1037353-31 x -635797-109 x -180823-307 x -64201-589 x -33463-2071 x -9517-3379 x -5833
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 19,709,707, 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 | 19,709,707 | |
| -1 | -19,709,707 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,709,707.
Example:
1 x 19,709,707 = 19,709,707
and
-1 x -19,709,707 = 19,709,707
Notice both answers equal 19,709,707
With that explanation out of the way, let's continue. Next, we take the number 19,709,707 and divide it by 2:
19,709,707 ÷ 2 = 9,854,853.5
If the quotient is a whole number, then 2 and 9,854,853.5 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 | 19,709,707 | |
| -1 | -19,709,707 |
Now, we try dividing 19,709,707 by 3:
19,709,707 ÷ 3 = 6,569,902.3333
If the quotient is a whole number, then 3 and 6,569,902.3333 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 | 19,709,707 | |
| -1 | -19,709,707 |
Let's try dividing by 4:
19,709,707 ÷ 4 = 4,927,426.75
If the quotient is a whole number, then 4 and 4,927,426.75 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 | 19,709,707 | |
| -1 | 19,709,707 |
If you did it right, you will end up with this table:
| 1 | 19 | 31 | 109 | 307 | 589 | 2,071 | 3,379 | 5,833 | 9,517 | 33,463 | 64,201 | 180,823 | 635,797 | 1,037,353 | 19,709,707 |
| -1 | -19 | -31 | -109 | -307 | -589 | -2,071 | -3,379 | -5,833 | -9,517 | -33,463 | -64,201 | -180,823 | -635,797 | -1,037,353 | -19,709,707 |
Here are some more numbers to try:
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