A:
Positive:
1 x 2851833143 x 66321747 x 606773103 x 276877137 x 2081632021 x 141114429 x 64394841 x 5891
Negative:
-1 x -28518331-43 x -663217-47 x -606773-103 x -276877-137 x -208163-2021 x -14111-4429 x -6439-4841 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 28,518,331, 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 | 28,518,331 | |
| -1 | -28,518,331 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,518,331.
Example:
1 x 28,518,331 = 28,518,331
and
-1 x -28,518,331 = 28,518,331
Notice both answers equal 28,518,331
With that explanation out of the way, let's continue. Next, we take the number 28,518,331 and divide it by 2:
28,518,331 ÷ 2 = 14,259,165.5
If the quotient is a whole number, then 2 and 14,259,165.5 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 | 28,518,331 | |
| -1 | -28,518,331 |
Now, we try dividing 28,518,331 by 3:
28,518,331 ÷ 3 = 9,506,110.3333
If the quotient is a whole number, then 3 and 9,506,110.3333 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 | 28,518,331 | |
| -1 | -28,518,331 |
Let's try dividing by 4:
28,518,331 ÷ 4 = 7,129,582.75
If the quotient is a whole number, then 4 and 7,129,582.75 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 | 28,518,331 | |
| -1 | 28,518,331 |
If you did it right, you will end up with this table:
| 1 | 43 | 47 | 103 | 137 | 2,021 | 4,429 | 4,841 | 5,891 | 6,439 | 14,111 | 208,163 | 276,877 | 606,773 | 663,217 | 28,518,331 |
| -1 | -43 | -47 | -103 | -137 | -2,021 | -4,429 | -4,841 | -5,891 | -6,439 | -14,111 | -208,163 | -276,877 | -606,773 | -663,217 | -28,518,331 |
Here are some more numbers to try:
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