A:
Positive:
1 x 2838872943 x 66020361 x 46538979 x 359351137 x 2072172623 x 108233397 x 83574819 x 5891
Negative:
-1 x -28388729-43 x -660203-61 x -465389-79 x -359351-137 x -207217-2623 x -10823-3397 x -8357-4819 x -5891
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 28,388,729, 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 | 28,388,729 | |
| -1 | -28,388,729 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,388,729.
Example:
1 x 28,388,729 = 28,388,729
and
-1 x -28,388,729 = 28,388,729
Notice both answers equal 28,388,729
With that explanation out of the way, let's continue. Next, we take the number 28,388,729 and divide it by 2:
28,388,729 ÷ 2 = 14,194,364.5
If the quotient is a whole number, then 2 and 14,194,364.5 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 | 28,388,729 | |
| -1 | -28,388,729 |
Now, we try dividing 28,388,729 by 3:
28,388,729 ÷ 3 = 9,462,909.6667
If the quotient is a whole number, then 3 and 9,462,909.6667 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 | 28,388,729 | |
| -1 | -28,388,729 |
Let's try dividing by 4:
28,388,729 ÷ 4 = 7,097,182.25
If the quotient is a whole number, then 4 and 7,097,182.25 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 | 28,388,729 | |
| -1 | 28,388,729 |
If you did it right, you will end up with this table:
| 1 | 43 | 61 | 79 | 137 | 2,623 | 3,397 | 4,819 | 5,891 | 8,357 | 10,823 | 207,217 | 359,351 | 465,389 | 660,203 | 28,388,729 |
| -1 | -43 | -61 | -79 | -137 | -2,623 | -3,397 | -4,819 | -5,891 | -8,357 | -10,823 | -207,217 | -359,351 | -465,389 | -660,203 | -28,388,729 |
Here are some more numbers to try:
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