A:
Positive:
1 x 1382424197 x 1974891717 x 8131907119 x 1161701163 x 8481131141 x 1211592771 x 498897127 x 19397
Negative:
-1 x -138242419-7 x -19748917-17 x -8131907-119 x -1161701-163 x -848113-1141 x -121159-2771 x -49889-7127 x -19397
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 138,242,419, 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 | 138,242,419 | |
| -1 | -138,242,419 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 138,242,419.
Example:
1 x 138,242,419 = 138,242,419
and
-1 x -138,242,419 = 138,242,419
Notice both answers equal 138,242,419
With that explanation out of the way, let's continue. Next, we take the number 138,242,419 and divide it by 2:
138,242,419 ÷ 2 = 69,121,209.5
If the quotient is a whole number, then 2 and 69,121,209.5 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 | 138,242,419 | |
| -1 | -138,242,419 |
Now, we try dividing 138,242,419 by 3:
138,242,419 ÷ 3 = 46,080,806.3333
If the quotient is a whole number, then 3 and 46,080,806.3333 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 | 138,242,419 | |
| -1 | -138,242,419 |
Let's try dividing by 4:
138,242,419 ÷ 4 = 34,560,604.75
If the quotient is a whole number, then 4 and 34,560,604.75 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 | 138,242,419 | |
| -1 | 138,242,419 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 119 | 163 | 1,141 | 2,771 | 7,127 | 19,397 | 49,889 | 121,159 | 848,113 | 1,161,701 | 8,131,907 | 19,748,917 | 138,242,419 |
| -1 | -7 | -17 | -119 | -163 | -1,141 | -2,771 | -7,127 | -19,397 | -49,889 | -121,159 | -848,113 | -1,161,701 | -8,131,907 | -19,748,917 | -138,242,419 |
Here are some more numbers to try:
Try the factor calculator