A:
Positive:
1 x 1385132455 x 2770264913 x 1065486523 x 602231565 x 2130973115 x 1204463169 x 819605299 x 463255845 x 1639211495 x 926513887 x 356357127 x 19435
Negative:
-1 x -138513245-5 x -27702649-13 x -10654865-23 x -6022315-65 x -2130973-115 x -1204463-169 x -819605-299 x -463255-845 x -163921-1495 x -92651-3887 x -35635-7127 x -19435
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 138,513,245, 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 | 138,513,245 | |
| -1 | -138,513,245 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 138,513,245.
Example:
1 x 138,513,245 = 138,513,245
and
-1 x -138,513,245 = 138,513,245
Notice both answers equal 138,513,245
With that explanation out of the way, let's continue. Next, we take the number 138,513,245 and divide it by 2:
138,513,245 ÷ 2 = 69,256,622.5
If the quotient is a whole number, then 2 and 69,256,622.5 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 | 138,513,245 | |
| -1 | -138,513,245 |
Now, we try dividing 138,513,245 by 3:
138,513,245 ÷ 3 = 46,171,081.6667
If the quotient is a whole number, then 3 and 46,171,081.6667 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 | 138,513,245 | |
| -1 | -138,513,245 |
Let's try dividing by 4:
138,513,245 ÷ 4 = 34,628,311.25
If the quotient is a whole number, then 4 and 34,628,311.25 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 | 138,513,245 | |
| -1 | 138,513,245 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 23 | 65 | 115 | 169 | 299 | 845 | 1,495 | 3,887 | 7,127 | 19,435 | 35,635 | 92,651 | 163,921 | 463,255 | 819,605 | 1,204,463 | 2,130,973 | 6,022,315 | 10,654,865 | 27,702,649 | 138,513,245 |
| -1 | -5 | -13 | -23 | -65 | -115 | -169 | -299 | -845 | -1,495 | -3,887 | -7,127 | -19,435 | -35,635 | -92,651 | -163,921 | -463,255 | -819,605 | -1,204,463 | -2,130,973 | -6,022,315 | -10,654,865 | -27,702,649 | -138,513,245 |
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