A:
Positive:
1 x 1308062217 x 1868660313 x 1006201723 x 568722791 x 1437431161 x 812461299 x 4374792093 x 62497
Negative:
-1 x -130806221-7 x -18686603-13 x -10062017-23 x -5687227-91 x -1437431-161 x -812461-299 x -437479-2093 x -62497
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 130,806,221, 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 | 130,806,221 | |
| -1 | -130,806,221 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 130,806,221.
Example:
1 x 130,806,221 = 130,806,221
and
-1 x -130,806,221 = 130,806,221
Notice both answers equal 130,806,221
With that explanation out of the way, let's continue. Next, we take the number 130,806,221 and divide it by 2:
130,806,221 ÷ 2 = 65,403,110.5
If the quotient is a whole number, then 2 and 65,403,110.5 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 | 130,806,221 | |
| -1 | -130,806,221 |
Now, we try dividing 130,806,221 by 3:
130,806,221 ÷ 3 = 43,602,073.6667
If the quotient is a whole number, then 3 and 43,602,073.6667 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 | 130,806,221 | |
| -1 | -130,806,221 |
Let's try dividing by 4:
130,806,221 ÷ 4 = 32,701,555.25
If the quotient is a whole number, then 4 and 32,701,555.25 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 | 130,806,221 | |
| -1 | 130,806,221 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 23 | 91 | 161 | 299 | 2,093 | 62,497 | 437,479 | 812,461 | 1,437,431 | 5,687,227 | 10,062,017 | 18,686,603 | 130,806,221 |
| -1 | -7 | -13 | -23 | -91 | -161 | -299 | -2,093 | -62,497 | -437,479 | -812,461 | -1,437,431 | -5,687,227 | -10,062,017 | -18,686,603 | -130,806,221 |
Here are some more numbers to try:
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