A:
Positive:
1 x 2215503555 x 4431007113 x 1704233519 x 1166054565 x 340846795 x 2332109247 x 8969651235 x 179393
Negative:
-1 x -221550355-5 x -44310071-13 x -17042335-19 x -11660545-65 x -3408467-95 x -2332109-247 x -896965-1235 x -179393
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 221,550,355, 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 | 221,550,355 | |
| -1 | -221,550,355 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 221,550,355.
Example:
1 x 221,550,355 = 221,550,355
and
-1 x -221,550,355 = 221,550,355
Notice both answers equal 221,550,355
With that explanation out of the way, let's continue. Next, we take the number 221,550,355 and divide it by 2:
221,550,355 ÷ 2 = 110,775,177.5
If the quotient is a whole number, then 2 and 110,775,177.5 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 | 221,550,355 | |
| -1 | -221,550,355 |
Now, we try dividing 221,550,355 by 3:
221,550,355 ÷ 3 = 73,850,118.3333
If the quotient is a whole number, then 3 and 73,850,118.3333 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 | 221,550,355 | |
| -1 | -221,550,355 |
Let's try dividing by 4:
221,550,355 ÷ 4 = 55,387,588.75
If the quotient is a whole number, then 4 and 55,387,588.75 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 | 221,550,355 | |
| -1 | 221,550,355 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 19 | 65 | 95 | 247 | 1,235 | 179,393 | 896,965 | 2,332,109 | 3,408,467 | 11,660,545 | 17,042,335 | 44,310,071 | 221,550,355 |
| -1 | -5 | -13 | -19 | -65 | -95 | -247 | -1,235 | -179,393 | -896,965 | -2,332,109 | -3,408,467 | -11,660,545 | -17,042,335 | -44,310,071 | -221,550,355 |
Here are some more numbers to try:
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