A:
Positive:
1 x 1300210317 x 1857443353 x 245322797 x 1340423371 x 350461679 x 1914893613 x 359875141 x 25291
Negative:
-1 x -130021031-7 x -18574433-53 x -2453227-97 x -1340423-371 x -350461-679 x -191489-3613 x -35987-5141 x -25291
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 130,021,031, 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 | 130,021,031 | |
| -1 | -130,021,031 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 130,021,031.
Example:
1 x 130,021,031 = 130,021,031
and
-1 x -130,021,031 = 130,021,031
Notice both answers equal 130,021,031
With that explanation out of the way, let's continue. Next, we take the number 130,021,031 and divide it by 2:
130,021,031 ÷ 2 = 65,010,515.5
If the quotient is a whole number, then 2 and 65,010,515.5 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 | 130,021,031 | |
| -1 | -130,021,031 |
Now, we try dividing 130,021,031 by 3:
130,021,031 ÷ 3 = 43,340,343.6667
If the quotient is a whole number, then 3 and 43,340,343.6667 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 | 130,021,031 | |
| -1 | -130,021,031 |
Let's try dividing by 4:
130,021,031 ÷ 4 = 32,505,257.75
If the quotient is a whole number, then 4 and 32,505,257.75 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 | 130,021,031 | |
| -1 | 130,021,031 |
If you did it right, you will end up with this table:
| 1 | 7 | 53 | 97 | 371 | 679 | 3,613 | 5,141 | 25,291 | 35,987 | 191,489 | 350,461 | 1,340,423 | 2,453,227 | 18,574,433 | 130,021,031 |
| -1 | -7 | -53 | -97 | -371 | -679 | -3,613 | -5,141 | -25,291 | -35,987 | -191,489 | -350,461 | -1,340,423 | -2,453,227 | -18,574,433 | -130,021,031 |
Here are some more numbers to try:
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