A:
Positive:
1 x 129197397 x 184567761 x 21179979 x 163541383 x 33733427 x 30257553 x 233632681 x 4819
Negative:
-1 x -12919739-7 x -1845677-61 x -211799-79 x -163541-383 x -33733-427 x -30257-553 x -23363-2681 x -4819
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 12,919,739, 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 | 12,919,739 | |
| -1 | -12,919,739 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,919,739.
Example:
1 x 12,919,739 = 12,919,739
and
-1 x -12,919,739 = 12,919,739
Notice both answers equal 12,919,739
With that explanation out of the way, let's continue. Next, we take the number 12,919,739 and divide it by 2:
12,919,739 ÷ 2 = 6,459,869.5
If the quotient is a whole number, then 2 and 6,459,869.5 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 | 12,919,739 | |
| -1 | -12,919,739 |
Now, we try dividing 12,919,739 by 3:
12,919,739 ÷ 3 = 4,306,579.6667
If the quotient is a whole number, then 3 and 4,306,579.6667 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 | 12,919,739 | |
| -1 | -12,919,739 |
Let's try dividing by 4:
12,919,739 ÷ 4 = 3,229,934.75
If the quotient is a whole number, then 4 and 3,229,934.75 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 | 12,919,739 | |
| -1 | 12,919,739 |
If you did it right, you will end up with this table:
| 1 | 7 | 61 | 79 | 383 | 427 | 553 | 2,681 | 4,819 | 23,363 | 30,257 | 33,733 | 163,541 | 211,799 | 1,845,677 | 12,919,739 |
| -1 | -7 | -61 | -79 | -383 | -427 | -553 | -2,681 | -4,819 | -23,363 | -30,257 | -33,733 | -163,541 | -211,799 | -1,845,677 | -12,919,739 |
Here are some more numbers to try:
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