A:
Positive:
1 x 2015515455 x 4031030913 x 1550396565 x 31007931013 x 1989653061 x 658455065 x 3979313169 x 15305
Negative:
-1 x -201551545-5 x -40310309-13 x -15503965-65 x -3100793-1013 x -198965-3061 x -65845-5065 x -39793-13169 x -15305
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 201,551,545, 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 | 201,551,545 | |
| -1 | -201,551,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 201,551,545.
Example:
1 x 201,551,545 = 201,551,545
and
-1 x -201,551,545 = 201,551,545
Notice both answers equal 201,551,545
With that explanation out of the way, let's continue. Next, we take the number 201,551,545 and divide it by 2:
201,551,545 ÷ 2 = 100,775,772.5
If the quotient is a whole number, then 2 and 100,775,772.5 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 | 201,551,545 | |
| -1 | -201,551,545 |
Now, we try dividing 201,551,545 by 3:
201,551,545 ÷ 3 = 67,183,848.3333
If the quotient is a whole number, then 3 and 67,183,848.3333 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 | 201,551,545 | |
| -1 | -201,551,545 |
Let's try dividing by 4:
201,551,545 ÷ 4 = 50,387,886.25
If the quotient is a whole number, then 4 and 50,387,886.25 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 | 201,551,545 | |
| -1 | 201,551,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 1,013 | 3,061 | 5,065 | 13,169 | 15,305 | 39,793 | 65,845 | 198,965 | 3,100,793 | 15,503,965 | 40,310,309 | 201,551,545 |
| -1 | -5 | -13 | -65 | -1,013 | -3,061 | -5,065 | -13,169 | -15,305 | -39,793 | -65,845 | -198,965 | -3,100,793 | -15,503,965 | -40,310,309 | -201,551,545 |
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