A:
Positive:
1 x 13014502137 x 351743347 x 276904367 x 19424631117 x 1165131739 x 748392479 x 524993149 x 41329
Negative:
-1 x -130145021-37 x -3517433-47 x -2769043-67 x -1942463-1117 x -116513-1739 x -74839-2479 x -52499-3149 x -41329
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 130,145,021, 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 | 130,145,021 | |
| -1 | -130,145,021 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 130,145,021.
Example:
1 x 130,145,021 = 130,145,021
and
-1 x -130,145,021 = 130,145,021
Notice both answers equal 130,145,021
With that explanation out of the way, let's continue. Next, we take the number 130,145,021 and divide it by 2:
130,145,021 ÷ 2 = 65,072,510.5
If the quotient is a whole number, then 2 and 65,072,510.5 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 | 130,145,021 | |
| -1 | -130,145,021 |
Now, we try dividing 130,145,021 by 3:
130,145,021 ÷ 3 = 43,381,673.6667
If the quotient is a whole number, then 3 and 43,381,673.6667 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 | 130,145,021 | |
| -1 | -130,145,021 |
Let's try dividing by 4:
130,145,021 ÷ 4 = 32,536,255.25
If the quotient is a whole number, then 4 and 32,536,255.25 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 | 130,145,021 | |
| -1 | 130,145,021 |
If you did it right, you will end up with this table:
| 1 | 37 | 47 | 67 | 1,117 | 1,739 | 2,479 | 3,149 | 41,329 | 52,499 | 74,839 | 116,513 | 1,942,463 | 2,769,043 | 3,517,433 | 130,145,021 |
| -1 | -37 | -47 | -67 | -1,117 | -1,739 | -2,479 | -3,149 | -41,329 | -52,499 | -74,839 | -116,513 | -1,942,463 | -2,769,043 | -3,517,433 | -130,145,021 |
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