A:
Positive:
1 x 187215355 x 37443077 x 267450535 x 534901167 x 112105835 x 224211169 x 160153203 x 5845
Negative:
-1 x -18721535-5 x -3744307-7 x -2674505-35 x -534901-167 x -112105-835 x -22421-1169 x -16015-3203 x -5845
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 18,721,535, 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 | 18,721,535 | |
| -1 | -18,721,535 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,721,535.
Example:
1 x 18,721,535 = 18,721,535
and
-1 x -18,721,535 = 18,721,535
Notice both answers equal 18,721,535
With that explanation out of the way, let's continue. Next, we take the number 18,721,535 and divide it by 2:
18,721,535 ÷ 2 = 9,360,767.5
If the quotient is a whole number, then 2 and 9,360,767.5 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 | 18,721,535 | |
| -1 | -18,721,535 |
Now, we try dividing 18,721,535 by 3:
18,721,535 ÷ 3 = 6,240,511.6667
If the quotient is a whole number, then 3 and 6,240,511.6667 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 | 18,721,535 | |
| -1 | -18,721,535 |
Let's try dividing by 4:
18,721,535 ÷ 4 = 4,680,383.75
If the quotient is a whole number, then 4 and 4,680,383.75 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 | 18,721,535 | |
| -1 | 18,721,535 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 167 | 835 | 1,169 | 3,203 | 5,845 | 16,015 | 22,421 | 112,105 | 534,901 | 2,674,505 | 3,744,307 | 18,721,535 |
| -1 | -5 | -7 | -35 | -167 | -835 | -1,169 | -3,203 | -5,845 | -16,015 | -22,421 | -112,105 | -534,901 | -2,674,505 | -3,744,307 | -18,721,535 |
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