A:
Positive:
1 x 2855128111 x 259557119 x 1502699121 x 235961209 x 1366091129 x 252891331 x 214512299 x 12419
Negative:
-1 x -28551281-11 x -2595571-19 x -1502699-121 x -235961-209 x -136609-1129 x -25289-1331 x -21451-2299 x -12419
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 28,551,281, 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 | 28,551,281 | |
| -1 | -28,551,281 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,551,281.
Example:
1 x 28,551,281 = 28,551,281
and
-1 x -28,551,281 = 28,551,281
Notice both answers equal 28,551,281
With that explanation out of the way, let's continue. Next, we take the number 28,551,281 and divide it by 2:
28,551,281 ÷ 2 = 14,275,640.5
If the quotient is a whole number, then 2 and 14,275,640.5 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 | 28,551,281 | |
| -1 | -28,551,281 |
Now, we try dividing 28,551,281 by 3:
28,551,281 ÷ 3 = 9,517,093.6667
If the quotient is a whole number, then 3 and 9,517,093.6667 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 | 28,551,281 | |
| -1 | -28,551,281 |
Let's try dividing by 4:
28,551,281 ÷ 4 = 7,137,820.25
If the quotient is a whole number, then 4 and 7,137,820.25 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 | 28,551,281 | |
| -1 | 28,551,281 |
If you did it right, you will end up with this table:
| 1 | 11 | 19 | 121 | 209 | 1,129 | 1,331 | 2,299 | 12,419 | 21,451 | 25,289 | 136,609 | 235,961 | 1,502,699 | 2,595,571 | 28,551,281 |
| -1 | -11 | -19 | -121 | -209 | -1,129 | -1,331 | -2,299 | -12,419 | -21,451 | -25,289 | -136,609 | -235,961 | -1,502,699 | -2,595,571 | -28,551,281 |
Here are some more numbers to try:
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