A:
Positive:
1 x 2829193913 x 217630337 x 764647131 x 215969449 x 63011481 x 588191703 x 166134847 x 5837
Negative:
-1 x -28291939-13 x -2176303-37 x -764647-131 x -215969-449 x -63011-481 x -58819-1703 x -16613-4847 x -5837
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 28,291,939, 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 | 28,291,939 | |
| -1 | -28,291,939 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,291,939.
Example:
1 x 28,291,939 = 28,291,939
and
-1 x -28,291,939 = 28,291,939
Notice both answers equal 28,291,939
With that explanation out of the way, let's continue. Next, we take the number 28,291,939 and divide it by 2:
28,291,939 ÷ 2 = 14,145,969.5
If the quotient is a whole number, then 2 and 14,145,969.5 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 | 28,291,939 | |
| -1 | -28,291,939 |
Now, we try dividing 28,291,939 by 3:
28,291,939 ÷ 3 = 9,430,646.3333
If the quotient is a whole number, then 3 and 9,430,646.3333 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 | 28,291,939 | |
| -1 | -28,291,939 |
Let's try dividing by 4:
28,291,939 ÷ 4 = 7,072,984.75
If the quotient is a whole number, then 4 and 7,072,984.75 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 | 28,291,939 | |
| -1 | 28,291,939 |
If you did it right, you will end up with this table:
| 1 | 13 | 37 | 131 | 449 | 481 | 1,703 | 4,847 | 5,837 | 16,613 | 58,819 | 63,011 | 215,969 | 764,647 | 2,176,303 | 28,291,939 |
| -1 | -13 | -37 | -131 | -449 | -481 | -1,703 | -4,847 | -5,837 | -16,613 | -58,819 | -63,011 | -215,969 | -764,647 | -2,176,303 | -28,291,939 |
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