A:
Positive:
1 x 286868455 x 573736911 x 260789555 x 521579199 x 144155995 x 288312189 x 131052621 x 10945
Negative:
-1 x -28686845-5 x -5737369-11 x -2607895-55 x -521579-199 x -144155-995 x -28831-2189 x -13105-2621 x -10945
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 28,686,845, 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 | 28,686,845 | |
| -1 | -28,686,845 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,686,845.
Example:
1 x 28,686,845 = 28,686,845
and
-1 x -28,686,845 = 28,686,845
Notice both answers equal 28,686,845
With that explanation out of the way, let's continue. Next, we take the number 28,686,845 and divide it by 2:
28,686,845 ÷ 2 = 14,343,422.5
If the quotient is a whole number, then 2 and 14,343,422.5 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 | 28,686,845 | |
| -1 | -28,686,845 |
Now, we try dividing 28,686,845 by 3:
28,686,845 ÷ 3 = 9,562,281.6667
If the quotient is a whole number, then 3 and 9,562,281.6667 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 | 28,686,845 | |
| -1 | -28,686,845 |
Let's try dividing by 4:
28,686,845 ÷ 4 = 7,171,711.25
If the quotient is a whole number, then 4 and 7,171,711.25 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 | 28,686,845 | |
| -1 | 28,686,845 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 199 | 995 | 2,189 | 2,621 | 10,945 | 13,105 | 28,831 | 144,155 | 521,579 | 2,607,895 | 5,737,369 | 28,686,845 |
| -1 | -5 | -11 | -55 | -199 | -995 | -2,189 | -2,621 | -10,945 | -13,105 | -28,831 | -144,155 | -521,579 | -2,607,895 | -5,737,369 | -28,686,845 |
Here are some more numbers to try:
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