A:
Positive:
1 x 128710455 x 257420911 x 117009531 x 41519555 x 234019155 x 83039341 x 377451705 x 7549
Negative:
-1 x -12871045-5 x -2574209-11 x -1170095-31 x -415195-55 x -234019-155 x -83039-341 x -37745-1705 x -7549
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 12,871,045, 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 | 12,871,045 | |
| -1 | -12,871,045 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,871,045.
Example:
1 x 12,871,045 = 12,871,045
and
-1 x -12,871,045 = 12,871,045
Notice both answers equal 12,871,045
With that explanation out of the way, let's continue. Next, we take the number 12,871,045 and divide it by 2:
12,871,045 ÷ 2 = 6,435,522.5
If the quotient is a whole number, then 2 and 6,435,522.5 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 | 12,871,045 | |
| -1 | -12,871,045 |
Now, we try dividing 12,871,045 by 3:
12,871,045 ÷ 3 = 4,290,348.3333
If the quotient is a whole number, then 3 and 4,290,348.3333 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 | 12,871,045 | |
| -1 | -12,871,045 |
Let's try dividing by 4:
12,871,045 ÷ 4 = 3,217,761.25
If the quotient is a whole number, then 4 and 3,217,761.25 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 | 12,871,045 | |
| -1 | 12,871,045 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 31 | 55 | 155 | 341 | 1,705 | 7,549 | 37,745 | 83,039 | 234,019 | 415,195 | 1,170,095 | 2,574,209 | 12,871,045 |
| -1 | -5 | -11 | -31 | -55 | -155 | -341 | -1,705 | -7,549 | -37,745 | -83,039 | -234,019 | -415,195 | -1,170,095 | -2,574,209 | -12,871,045 |
Here are some more numbers to try:
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