A:
Positive:
1 x 2201212937 x 3144589923 x 9570491161 x 1367213223 x 9870911561 x 1410135129 x 429176131 x 35903
Negative:
-1 x -220121293-7 x -31445899-23 x -9570491-161 x -1367213-223 x -987091-1561 x -141013-5129 x -42917-6131 x -35903
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 220,121,293, 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 | 220,121,293 | |
| -1 | -220,121,293 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 220,121,293.
Example:
1 x 220,121,293 = 220,121,293
and
-1 x -220,121,293 = 220,121,293
Notice both answers equal 220,121,293
With that explanation out of the way, let's continue. Next, we take the number 220,121,293 and divide it by 2:
220,121,293 ÷ 2 = 110,060,646.5
If the quotient is a whole number, then 2 and 110,060,646.5 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 | 220,121,293 | |
| -1 | -220,121,293 |
Now, we try dividing 220,121,293 by 3:
220,121,293 ÷ 3 = 73,373,764.3333
If the quotient is a whole number, then 3 and 73,373,764.3333 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 | 220,121,293 | |
| -1 | -220,121,293 |
Let's try dividing by 4:
220,121,293 ÷ 4 = 55,030,323.25
If the quotient is a whole number, then 4 and 55,030,323.25 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 | 220,121,293 | |
| -1 | 220,121,293 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 161 | 223 | 1,561 | 5,129 | 6,131 | 35,903 | 42,917 | 141,013 | 987,091 | 1,367,213 | 9,570,491 | 31,445,899 | 220,121,293 |
| -1 | -7 | -23 | -161 | -223 | -1,561 | -5,129 | -6,131 | -35,903 | -42,917 | -141,013 | -987,091 | -1,367,213 | -9,570,491 | -31,445,899 | -220,121,293 |
Here are some more numbers to try:
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