A:
Positive:
1 x 22166455311 x 20151323193 x 1148521263 x 842831397 x 5583492123 x 1044112893 x 766214367 x 50759
Negative:
-1 x -221664553-11 x -20151323-193 x -1148521-263 x -842831-397 x -558349-2123 x -104411-2893 x -76621-4367 x -50759
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 221,664,553, 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 | 221,664,553 | |
| -1 | -221,664,553 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 221,664,553.
Example:
1 x 221,664,553 = 221,664,553
and
-1 x -221,664,553 = 221,664,553
Notice both answers equal 221,664,553
With that explanation out of the way, let's continue. Next, we take the number 221,664,553 and divide it by 2:
221,664,553 ÷ 2 = 110,832,276.5
If the quotient is a whole number, then 2 and 110,832,276.5 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 | 221,664,553 | |
| -1 | -221,664,553 |
Now, we try dividing 221,664,553 by 3:
221,664,553 ÷ 3 = 73,888,184.3333
If the quotient is a whole number, then 3 and 73,888,184.3333 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 | 221,664,553 | |
| -1 | -221,664,553 |
Let's try dividing by 4:
221,664,553 ÷ 4 = 55,416,138.25
If the quotient is a whole number, then 4 and 55,416,138.25 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 | 221,664,553 | |
| -1 | 221,664,553 |
If you did it right, you will end up with this table:
| 1 | 11 | 193 | 263 | 397 | 2,123 | 2,893 | 4,367 | 50,759 | 76,621 | 104,411 | 558,349 | 842,831 | 1,148,521 | 20,151,323 | 221,664,553 |
| -1 | -11 | -193 | -263 | -397 | -2,123 | -2,893 | -4,367 | -50,759 | -76,621 | -104,411 | -558,349 | -842,831 | -1,148,521 | -20,151,323 | -221,664,553 |
Here are some more numbers to try:
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