A:
Positive:
1 x 1265591919 x 66610129 x 436411103 x 122873223 x 56753551 x 229691957 x 64672987 x 4237
Negative:
-1 x -12655919-19 x -666101-29 x -436411-103 x -122873-223 x -56753-551 x -22969-1957 x -6467-2987 x -4237
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 12,655,919, 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 | 12,655,919 | |
| -1 | -12,655,919 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,655,919.
Example:
1 x 12,655,919 = 12,655,919
and
-1 x -12,655,919 = 12,655,919
Notice both answers equal 12,655,919
With that explanation out of the way, let's continue. Next, we take the number 12,655,919 and divide it by 2:
12,655,919 ÷ 2 = 6,327,959.5
If the quotient is a whole number, then 2 and 6,327,959.5 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 | 12,655,919 | |
| -1 | -12,655,919 |
Now, we try dividing 12,655,919 by 3:
12,655,919 ÷ 3 = 4,218,639.6667
If the quotient is a whole number, then 3 and 4,218,639.6667 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 | 12,655,919 | |
| -1 | -12,655,919 |
Let's try dividing by 4:
12,655,919 ÷ 4 = 3,163,979.75
If the quotient is a whole number, then 4 and 3,163,979.75 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 | 12,655,919 | |
| -1 | 12,655,919 |
If you did it right, you will end up with this table:
| 1 | 19 | 29 | 103 | 223 | 551 | 1,957 | 2,987 | 4,237 | 6,467 | 22,969 | 56,753 | 122,873 | 436,411 | 666,101 | 12,655,919 |
| -1 | -19 | -29 | -103 | -223 | -551 | -1,957 | -2,987 | -4,237 | -6,467 | -22,969 | -56,753 | -122,873 | -436,411 | -666,101 | -12,655,919 |
Here are some more numbers to try:
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