A:
Positive:
1 x 22021119719 x 1159006331 x 7103587137 x 1607381589 x 3738732603 x 845992729 x 806934247 x 51851
Negative:
-1 x -220211197-19 x -11590063-31 x -7103587-137 x -1607381-589 x -373873-2603 x -84599-2729 x -80693-4247 x -51851
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 220,211,197, 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 | 220,211,197 | |
| -1 | -220,211,197 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 220,211,197.
Example:
1 x 220,211,197 = 220,211,197
and
-1 x -220,211,197 = 220,211,197
Notice both answers equal 220,211,197
With that explanation out of the way, let's continue. Next, we take the number 220,211,197 and divide it by 2:
220,211,197 ÷ 2 = 110,105,598.5
If the quotient is a whole number, then 2 and 110,105,598.5 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 | 220,211,197 | |
| -1 | -220,211,197 |
Now, we try dividing 220,211,197 by 3:
220,211,197 ÷ 3 = 73,403,732.3333
If the quotient is a whole number, then 3 and 73,403,732.3333 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 | 220,211,197 | |
| -1 | -220,211,197 |
Let's try dividing by 4:
220,211,197 ÷ 4 = 55,052,799.25
If the quotient is a whole number, then 4 and 55,052,799.25 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 | 220,211,197 | |
| -1 | 220,211,197 |
If you did it right, you will end up with this table:
| 1 | 19 | 31 | 137 | 589 | 2,603 | 2,729 | 4,247 | 51,851 | 80,693 | 84,599 | 373,873 | 1,607,381 | 7,103,587 | 11,590,063 | 220,211,197 |
| -1 | -19 | -31 | -137 | -589 | -2,603 | -2,729 | -4,247 | -51,851 | -80,693 | -84,599 | -373,873 | -1,607,381 | -7,103,587 | -11,590,063 | -220,211,197 |
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