A:
Positive:
1 x 15586387713 x 1198952931 x 5027867403 x 386759439 x 355043881 x 1769175707 x 2731111453 x 13609
Negative:
-1 x -155863877-13 x -11989529-31 x -5027867-403 x -386759-439 x -355043-881 x -176917-5707 x -27311-11453 x -13609
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 155,863,877, 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 | 155,863,877 | |
| -1 | -155,863,877 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,863,877.
Example:
1 x 155,863,877 = 155,863,877
and
-1 x -155,863,877 = 155,863,877
Notice both answers equal 155,863,877
With that explanation out of the way, let's continue. Next, we take the number 155,863,877 and divide it by 2:
155,863,877 ÷ 2 = 77,931,938.5
If the quotient is a whole number, then 2 and 77,931,938.5 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 | 155,863,877 | |
| -1 | -155,863,877 |
Now, we try dividing 155,863,877 by 3:
155,863,877 ÷ 3 = 51,954,625.6667
If the quotient is a whole number, then 3 and 51,954,625.6667 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 | 155,863,877 | |
| -1 | -155,863,877 |
Let's try dividing by 4:
155,863,877 ÷ 4 = 38,965,969.25
If the quotient is a whole number, then 4 and 38,965,969.25 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 | 155,863,877 | |
| -1 | 155,863,877 |
If you did it right, you will end up with this table:
| 1 | 13 | 31 | 403 | 439 | 881 | 5,707 | 11,453 | 13,609 | 27,311 | 176,917 | 355,043 | 386,759 | 5,027,867 | 11,989,529 | 155,863,877 |
| -1 | -13 | -31 | -403 | -439 | -881 | -5,707 | -11,453 | -13,609 | -27,311 | -176,917 | -355,043 | -386,759 | -5,027,867 | -11,989,529 | -155,863,877 |
Here are some more numbers to try:
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