A:
Positive:
1 x 22115672317 x 1300921989 x 2484907313 x 706571467 x 4735691513 x 1461715321 x 415637939 x 27857
Negative:
-1 x -221156723-17 x -13009219-89 x -2484907-313 x -706571-467 x -473569-1513 x -146171-5321 x -41563-7939 x -27857
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 221,156,723, 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 | 221,156,723 | |
| -1 | -221,156,723 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 221,156,723.
Example:
1 x 221,156,723 = 221,156,723
and
-1 x -221,156,723 = 221,156,723
Notice both answers equal 221,156,723
With that explanation out of the way, let's continue. Next, we take the number 221,156,723 and divide it by 2:
221,156,723 ÷ 2 = 110,578,361.5
If the quotient is a whole number, then 2 and 110,578,361.5 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 | 221,156,723 | |
| -1 | -221,156,723 |
Now, we try dividing 221,156,723 by 3:
221,156,723 ÷ 3 = 73,718,907.6667
If the quotient is a whole number, then 3 and 73,718,907.6667 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 | 221,156,723 | |
| -1 | -221,156,723 |
Let's try dividing by 4:
221,156,723 ÷ 4 = 55,289,180.75
If the quotient is a whole number, then 4 and 55,289,180.75 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 | 221,156,723 | |
| -1 | 221,156,723 |
If you did it right, you will end up with this table:
| 1 | 17 | 89 | 313 | 467 | 1,513 | 5,321 | 7,939 | 27,857 | 41,563 | 146,171 | 473,569 | 706,571 | 2,484,907 | 13,009,219 | 221,156,723 |
| -1 | -17 | -89 | -313 | -467 | -1,513 | -5,321 | -7,939 | -27,857 | -41,563 | -146,171 | -473,569 | -706,571 | -2,484,907 | -13,009,219 | -221,156,723 |
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