A:
Positive:
1 x 1970153997 x 2814505747 x 4191817149 x 1322251329 x 5988311043 x 1888934019 x 490217003 x 28133
Negative:
-1 x -197015399-7 x -28145057-47 x -4191817-149 x -1322251-329 x -598831-1043 x -188893-4019 x -49021-7003 x -28133
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 197,015,399, 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 | 197,015,399 | |
| -1 | -197,015,399 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 197,015,399.
Example:
1 x 197,015,399 = 197,015,399
and
-1 x -197,015,399 = 197,015,399
Notice both answers equal 197,015,399
With that explanation out of the way, let's continue. Next, we take the number 197,015,399 and divide it by 2:
197,015,399 ÷ 2 = 98,507,699.5
If the quotient is a whole number, then 2 and 98,507,699.5 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 | 197,015,399 | |
| -1 | -197,015,399 |
Now, we try dividing 197,015,399 by 3:
197,015,399 ÷ 3 = 65,671,799.6667
If the quotient is a whole number, then 3 and 65,671,799.6667 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 | 197,015,399 | |
| -1 | -197,015,399 |
Let's try dividing by 4:
197,015,399 ÷ 4 = 49,253,849.75
If the quotient is a whole number, then 4 and 49,253,849.75 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 | 197,015,399 | |
| -1 | 197,015,399 |
If you did it right, you will end up with this table:
| 1 | 7 | 47 | 149 | 329 | 1,043 | 4,019 | 7,003 | 28,133 | 49,021 | 188,893 | 598,831 | 1,322,251 | 4,191,817 | 28,145,057 | 197,015,399 |
| -1 | -7 | -47 | -149 | -329 | -1,043 | -4,019 | -7,003 | -28,133 | -49,021 | -188,893 | -598,831 | -1,322,251 | -4,191,817 | -28,145,057 | -197,015,399 |
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