A:
Positive:
1 x 2253216555 x 4506433113 x 1733243517 x 1325421565 x 346648785 x 2650843221 x 10195551105 x 203911
Negative:
-1 x -225321655-5 x -45064331-13 x -17332435-17 x -13254215-65 x -3466487-85 x -2650843-221 x -1019555-1105 x -203911
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 225,321,655, 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 | 225,321,655 | |
| -1 | -225,321,655 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 225,321,655.
Example:
1 x 225,321,655 = 225,321,655
and
-1 x -225,321,655 = 225,321,655
Notice both answers equal 225,321,655
With that explanation out of the way, let's continue. Next, we take the number 225,321,655 and divide it by 2:
225,321,655 ÷ 2 = 112,660,827.5
If the quotient is a whole number, then 2 and 112,660,827.5 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 | 225,321,655 | |
| -1 | -225,321,655 |
Now, we try dividing 225,321,655 by 3:
225,321,655 ÷ 3 = 75,107,218.3333
If the quotient is a whole number, then 3 and 75,107,218.3333 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 | 225,321,655 | |
| -1 | -225,321,655 |
Let's try dividing by 4:
225,321,655 ÷ 4 = 56,330,413.75
If the quotient is a whole number, then 4 and 56,330,413.75 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 | 225,321,655 | |
| -1 | 225,321,655 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 17 | 65 | 85 | 221 | 1,105 | 203,911 | 1,019,555 | 2,650,843 | 3,466,487 | 13,254,215 | 17,332,435 | 45,064,331 | 225,321,655 |
| -1 | -5 | -13 | -17 | -65 | -85 | -221 | -1,105 | -203,911 | -1,019,555 | -2,650,843 | -3,466,487 | -13,254,215 | -17,332,435 | -45,064,331 | -225,321,655 |
Here are some more numbers to try:
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