A:
Positive:
1 x 2212123455 x 4424246919 x 1164275595 x 2328551421 x 5254452105 x 1050895531 x 399957999 x 27655
Negative:
-1 x -221212345-5 x -44242469-19 x -11642755-95 x -2328551-421 x -525445-2105 x -105089-5531 x -39995-7999 x -27655
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 221,212,345, 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 | 221,212,345 | |
| -1 | -221,212,345 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 221,212,345.
Example:
1 x 221,212,345 = 221,212,345
and
-1 x -221,212,345 = 221,212,345
Notice both answers equal 221,212,345
With that explanation out of the way, let's continue. Next, we take the number 221,212,345 and divide it by 2:
221,212,345 ÷ 2 = 110,606,172.5
If the quotient is a whole number, then 2 and 110,606,172.5 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 | 221,212,345 | |
| -1 | -221,212,345 |
Now, we try dividing 221,212,345 by 3:
221,212,345 ÷ 3 = 73,737,448.3333
If the quotient is a whole number, then 3 and 73,737,448.3333 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 | 221,212,345 | |
| -1 | -221,212,345 |
Let's try dividing by 4:
221,212,345 ÷ 4 = 55,303,086.25
If the quotient is a whole number, then 4 and 55,303,086.25 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 | 221,212,345 | |
| -1 | 221,212,345 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 421 | 2,105 | 5,531 | 7,999 | 27,655 | 39,995 | 105,089 | 525,445 | 2,328,551 | 11,642,755 | 44,242,469 | 221,212,345 |
| -1 | -5 | -19 | -95 | -421 | -2,105 | -5,531 | -7,999 | -27,655 | -39,995 | -105,089 | -525,445 | -2,328,551 | -11,642,755 | -44,242,469 | -221,212,345 |
Here are some more numbers to try:
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