A:
Positive:
1 x 281470555 x 562941123 x 1223785115 x 244757311 x 90505787 x 357651555 x 181013935 x 7153
Negative:
-1 x -28147055-5 x -5629411-23 x -1223785-115 x -244757-311 x -90505-787 x -35765-1555 x -18101-3935 x -7153
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 28,147,055, 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 | 28,147,055 | |
| -1 | -28,147,055 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,147,055.
Example:
1 x 28,147,055 = 28,147,055
and
-1 x -28,147,055 = 28,147,055
Notice both answers equal 28,147,055
With that explanation out of the way, let's continue. Next, we take the number 28,147,055 and divide it by 2:
28,147,055 ÷ 2 = 14,073,527.5
If the quotient is a whole number, then 2 and 14,073,527.5 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 | 28,147,055 | |
| -1 | -28,147,055 |
Now, we try dividing 28,147,055 by 3:
28,147,055 ÷ 3 = 9,382,351.6667
If the quotient is a whole number, then 3 and 9,382,351.6667 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 | 28,147,055 | |
| -1 | -28,147,055 |
Let's try dividing by 4:
28,147,055 ÷ 4 = 7,036,763.75
If the quotient is a whole number, then 4 and 7,036,763.75 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 | 28,147,055 | |
| -1 | 28,147,055 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 311 | 787 | 1,555 | 3,935 | 7,153 | 18,101 | 35,765 | 90,505 | 244,757 | 1,223,785 | 5,629,411 | 28,147,055 |
| -1 | -5 | -23 | -115 | -311 | -787 | -1,555 | -3,935 | -7,153 | -18,101 | -35,765 | -90,505 | -244,757 | -1,223,785 | -5,629,411 | -28,147,055 |
Here are some more numbers to try:
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