A:
Positive:
1 x 2215031155 x 4430062317 x 1302959541 x 540251585 x 2605919205 x 1080503697 x 3177953485 x 63559
Negative:
-1 x -221503115-5 x -44300623-17 x -13029595-41 x -5402515-85 x -2605919-205 x -1080503-697 x -317795-3485 x -63559
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 221,503,115, 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 | 221,503,115 | |
| -1 | -221,503,115 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 221,503,115.
Example:
1 x 221,503,115 = 221,503,115
and
-1 x -221,503,115 = 221,503,115
Notice both answers equal 221,503,115
With that explanation out of the way, let's continue. Next, we take the number 221,503,115 and divide it by 2:
221,503,115 ÷ 2 = 110,751,557.5
If the quotient is a whole number, then 2 and 110,751,557.5 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 | 221,503,115 | |
| -1 | -221,503,115 |
Now, we try dividing 221,503,115 by 3:
221,503,115 ÷ 3 = 73,834,371.6667
If the quotient is a whole number, then 3 and 73,834,371.6667 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 | 221,503,115 | |
| -1 | -221,503,115 |
Let's try dividing by 4:
221,503,115 ÷ 4 = 55,375,778.75
If the quotient is a whole number, then 4 and 55,375,778.75 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 | 221,503,115 | |
| -1 | 221,503,115 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 41 | 85 | 205 | 697 | 3,485 | 63,559 | 317,795 | 1,080,503 | 2,605,919 | 5,402,515 | 13,029,595 | 44,300,623 | 221,503,115 |
| -1 | -5 | -17 | -41 | -85 | -205 | -697 | -3,485 | -63,559 | -317,795 | -1,080,503 | -2,605,919 | -5,402,515 | -13,029,595 | -44,300,623 | -221,503,115 |
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