A:
Positive:
1 x 1211586537 x 1730837911 x 1101442377 x 1573489241 x 5027331687 x 718192651 x 457036529 x 18557
Negative:
-1 x -121158653-7 x -17308379-11 x -11014423-77 x -1573489-241 x -502733-1687 x -71819-2651 x -45703-6529 x -18557
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 121,158,653, 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 | 121,158,653 | |
| -1 | -121,158,653 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,158,653.
Example:
1 x 121,158,653 = 121,158,653
and
-1 x -121,158,653 = 121,158,653
Notice both answers equal 121,158,653
With that explanation out of the way, let's continue. Next, we take the number 121,158,653 and divide it by 2:
121,158,653 ÷ 2 = 60,579,326.5
If the quotient is a whole number, then 2 and 60,579,326.5 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 | 121,158,653 | |
| -1 | -121,158,653 |
Now, we try dividing 121,158,653 by 3:
121,158,653 ÷ 3 = 40,386,217.6667
If the quotient is a whole number, then 3 and 40,386,217.6667 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 | 121,158,653 | |
| -1 | -121,158,653 |
Let's try dividing by 4:
121,158,653 ÷ 4 = 30,289,663.25
If the quotient is a whole number, then 4 and 30,289,663.25 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 | 121,158,653 | |
| -1 | 121,158,653 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 241 | 1,687 | 2,651 | 6,529 | 18,557 | 45,703 | 71,819 | 502,733 | 1,573,489 | 11,014,423 | 17,308,379 | 121,158,653 |
| -1 | -7 | -11 | -77 | -241 | -1,687 | -2,651 | -6,529 | -18,557 | -45,703 | -71,819 | -502,733 | -1,573,489 | -11,014,423 | -17,308,379 | -121,158,653 |
Here are some more numbers to try:
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