A:
Positive:
1 x 22012302117 x 1294841329 x 7590449493 x 446497521 x 422501857 x 2568538857 x 2485314569 x 15109
Negative:
-1 x -220123021-17 x -12948413-29 x -7590449-493 x -446497-521 x -422501-857 x -256853-8857 x -24853-14569 x -15109
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 220,123,021, 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 | 220,123,021 | |
| -1 | -220,123,021 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 220,123,021.
Example:
1 x 220,123,021 = 220,123,021
and
-1 x -220,123,021 = 220,123,021
Notice both answers equal 220,123,021
With that explanation out of the way, let's continue. Next, we take the number 220,123,021 and divide it by 2:
220,123,021 ÷ 2 = 110,061,510.5
If the quotient is a whole number, then 2 and 110,061,510.5 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 | 220,123,021 | |
| -1 | -220,123,021 |
Now, we try dividing 220,123,021 by 3:
220,123,021 ÷ 3 = 73,374,340.3333
If the quotient is a whole number, then 3 and 73,374,340.3333 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 | 220,123,021 | |
| -1 | -220,123,021 |
Let's try dividing by 4:
220,123,021 ÷ 4 = 55,030,755.25
If the quotient is a whole number, then 4 and 55,030,755.25 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 | 220,123,021 | |
| -1 | 220,123,021 |
If you did it right, you will end up with this table:
| 1 | 17 | 29 | 493 | 521 | 857 | 8,857 | 14,569 | 15,109 | 24,853 | 256,853 | 422,501 | 446,497 | 7,590,449 | 12,948,413 | 220,123,021 |
| -1 | -17 | -29 | -493 | -521 | -857 | -8,857 | -14,569 | -15,109 | -24,853 | -256,853 | -422,501 | -446,497 | -7,590,449 | -12,948,413 | -220,123,021 |
Here are some more numbers to try:
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