A:
Positive:
1 x 1397191397 x 1995987731 x 450706949 x 285141159 x 2368121217 x 643867413 x 3383031519 x 919811559 x 896211829 x 763912891 x 4832910913 x 12803
Negative:
-1 x -139719139-7 x -19959877-31 x -4507069-49 x -2851411-59 x -2368121-217 x -643867-413 x -338303-1519 x -91981-1559 x -89621-1829 x -76391-2891 x -48329-10913 x -12803
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 139,719,139, 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 | 139,719,139 | |
| -1 | -139,719,139 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 139,719,139.
Example:
1 x 139,719,139 = 139,719,139
and
-1 x -139,719,139 = 139,719,139
Notice both answers equal 139,719,139
With that explanation out of the way, let's continue. Next, we take the number 139,719,139 and divide it by 2:
139,719,139 ÷ 2 = 69,859,569.5
If the quotient is a whole number, then 2 and 69,859,569.5 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 | 139,719,139 | |
| -1 | -139,719,139 |
Now, we try dividing 139,719,139 by 3:
139,719,139 ÷ 3 = 46,573,046.3333
If the quotient is a whole number, then 3 and 46,573,046.3333 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 | 139,719,139 | |
| -1 | -139,719,139 |
Let's try dividing by 4:
139,719,139 ÷ 4 = 34,929,784.75
If the quotient is a whole number, then 4 and 34,929,784.75 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 | 139,719,139 | |
| -1 | 139,719,139 |
If you did it right, you will end up with this table:
| 1 | 7 | 31 | 49 | 59 | 217 | 413 | 1,519 | 1,559 | 1,829 | 2,891 | 10,913 | 12,803 | 48,329 | 76,391 | 89,621 | 91,981 | 338,303 | 643,867 | 2,368,121 | 2,851,411 | 4,507,069 | 19,959,877 | 139,719,139 |
| -1 | -7 | -31 | -49 | -59 | -217 | -413 | -1,519 | -1,559 | -1,829 | -2,891 | -10,913 | -12,803 | -48,329 | -76,391 | -89,621 | -91,981 | -338,303 | -643,867 | -2,368,121 | -2,851,411 | -4,507,069 | -19,959,877 | -139,719,139 |
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