A:
Positive:
1 x 13021342113 x 1001641717 x 765961353 x 2456857221 x 589201689 x 188989901 x 14452111117 x 11713
Negative:
-1 x -130213421-13 x -10016417-17 x -7659613-53 x -2456857-221 x -589201-689 x -188989-901 x -144521-11117 x -11713
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 130,213,421, 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 | 130,213,421 | |
| -1 | -130,213,421 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 130,213,421.
Example:
1 x 130,213,421 = 130,213,421
and
-1 x -130,213,421 = 130,213,421
Notice both answers equal 130,213,421
With that explanation out of the way, let's continue. Next, we take the number 130,213,421 and divide it by 2:
130,213,421 ÷ 2 = 65,106,710.5
If the quotient is a whole number, then 2 and 65,106,710.5 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 | 130,213,421 | |
| -1 | -130,213,421 |
Now, we try dividing 130,213,421 by 3:
130,213,421 ÷ 3 = 43,404,473.6667
If the quotient is a whole number, then 3 and 43,404,473.6667 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 | 130,213,421 | |
| -1 | -130,213,421 |
Let's try dividing by 4:
130,213,421 ÷ 4 = 32,553,355.25
If the quotient is a whole number, then 4 and 32,553,355.25 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 | 130,213,421 | |
| -1 | 130,213,421 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 53 | 221 | 689 | 901 | 11,117 | 11,713 | 144,521 | 188,989 | 589,201 | 2,456,857 | 7,659,613 | 10,016,417 | 130,213,421 |
| -1 | -13 | -17 | -53 | -221 | -689 | -901 | -11,117 | -11,713 | -144,521 | -188,989 | -589,201 | -2,456,857 | -7,659,613 | -10,016,417 | -130,213,421 |
Here are some more numbers to try:
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