A:
Positive:
1 x 168133917 x 240191317 x 98902323 x 731017119 x 141289161 x 104431391 x 430012737 x 6143
Negative:
-1 x -16813391-7 x -2401913-17 x -989023-23 x -731017-119 x -141289-161 x -104431-391 x -43001-2737 x -6143
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 16,813,391, 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 | 16,813,391 | |
| -1 | -16,813,391 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,813,391.
Example:
1 x 16,813,391 = 16,813,391
and
-1 x -16,813,391 = 16,813,391
Notice both answers equal 16,813,391
With that explanation out of the way, let's continue. Next, we take the number 16,813,391 and divide it by 2:
16,813,391 ÷ 2 = 8,406,695.5
If the quotient is a whole number, then 2 and 8,406,695.5 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 | 16,813,391 | |
| -1 | -16,813,391 |
Now, we try dividing 16,813,391 by 3:
16,813,391 ÷ 3 = 5,604,463.6667
If the quotient is a whole number, then 3 and 5,604,463.6667 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 | 16,813,391 | |
| -1 | -16,813,391 |
Let's try dividing by 4:
16,813,391 ÷ 4 = 4,203,347.75
If the quotient is a whole number, then 4 and 4,203,347.75 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 | 16,813,391 | |
| -1 | 16,813,391 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 23 | 119 | 161 | 391 | 2,737 | 6,143 | 43,001 | 104,431 | 141,289 | 731,017 | 989,023 | 2,401,913 | 16,813,391 |
| -1 | -7 | -17 | -23 | -119 | -161 | -391 | -2,737 | -6,143 | -43,001 | -104,431 | -141,289 | -731,017 | -989,023 | -2,401,913 | -16,813,391 |
Here are some more numbers to try:
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