A:
Positive:
1 x 13037821917 x 766930731 x 420574973 x 1786003527 x 2473971241 x 1050592263 x 576133389 x 38471
Negative:
-1 x -130378219-17 x -7669307-31 x -4205749-73 x -1786003-527 x -247397-1241 x -105059-2263 x -57613-3389 x -38471
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 130,378,219, 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 | 130,378,219 | |
| -1 | -130,378,219 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 130,378,219.
Example:
1 x 130,378,219 = 130,378,219
and
-1 x -130,378,219 = 130,378,219
Notice both answers equal 130,378,219
With that explanation out of the way, let's continue. Next, we take the number 130,378,219 and divide it by 2:
130,378,219 ÷ 2 = 65,189,109.5
If the quotient is a whole number, then 2 and 65,189,109.5 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 | 130,378,219 | |
| -1 | -130,378,219 |
Now, we try dividing 130,378,219 by 3:
130,378,219 ÷ 3 = 43,459,406.3333
If the quotient is a whole number, then 3 and 43,459,406.3333 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 | 130,378,219 | |
| -1 | -130,378,219 |
Let's try dividing by 4:
130,378,219 ÷ 4 = 32,594,554.75
If the quotient is a whole number, then 4 and 32,594,554.75 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 | 130,378,219 | |
| -1 | 130,378,219 |
If you did it right, you will end up with this table:
| 1 | 17 | 31 | 73 | 527 | 1,241 | 2,263 | 3,389 | 38,471 | 57,613 | 105,059 | 247,397 | 1,786,003 | 4,205,749 | 7,669,307 | 130,378,219 |
| -1 | -17 | -31 | -73 | -527 | -1,241 | -2,263 | -3,389 | -38,471 | -57,613 | -105,059 | -247,397 | -1,786,003 | -4,205,749 | -7,669,307 | -130,378,219 |
Here are some more numbers to try:
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