A:
Positive:
1 x 1387756377 x 1982509111 x 1261596713 x 1067504977 x 180228191 x 1525007143 x 9704591001 x 138637
Negative:
-1 x -138775637-7 x -19825091-11 x -12615967-13 x -10675049-77 x -1802281-91 x -1525007-143 x -970459-1001 x -138637
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 138,775,637, 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 | 138,775,637 | |
| -1 | -138,775,637 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 138,775,637.
Example:
1 x 138,775,637 = 138,775,637
and
-1 x -138,775,637 = 138,775,637
Notice both answers equal 138,775,637
With that explanation out of the way, let's continue. Next, we take the number 138,775,637 and divide it by 2:
138,775,637 ÷ 2 = 69,387,818.5
If the quotient is a whole number, then 2 and 69,387,818.5 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 | 138,775,637 | |
| -1 | -138,775,637 |
Now, we try dividing 138,775,637 by 3:
138,775,637 ÷ 3 = 46,258,545.6667
If the quotient is a whole number, then 3 and 46,258,545.6667 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 | 138,775,637 | |
| -1 | -138,775,637 |
Let's try dividing by 4:
138,775,637 ÷ 4 = 34,693,909.25
If the quotient is a whole number, then 4 and 34,693,909.25 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 | 138,775,637 | |
| -1 | 138,775,637 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 13 | 77 | 91 | 143 | 1,001 | 138,637 | 970,459 | 1,525,007 | 1,802,281 | 10,675,049 | 12,615,967 | 19,825,091 | 138,775,637 |
| -1 | -7 | -11 | -13 | -77 | -91 | -143 | -1,001 | -138,637 | -970,459 | -1,525,007 | -1,802,281 | -10,675,049 | -12,615,967 | -19,825,091 | -138,775,637 |
Here are some more numbers to try:
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