A:
Positive:
1 x 15511214319 x 816379741 x 378322383 x 1868821779 x 1991171577 x 983592399 x 646573403 x 45581
Negative:
-1 x -155112143-19 x -8163797-41 x -3783223-83 x -1868821-779 x -199117-1577 x -98359-2399 x -64657-3403 x -45581
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 155,112,143, 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 | 155,112,143 | |
| -1 | -155,112,143 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,112,143.
Example:
1 x 155,112,143 = 155,112,143
and
-1 x -155,112,143 = 155,112,143
Notice both answers equal 155,112,143
With that explanation out of the way, let's continue. Next, we take the number 155,112,143 and divide it by 2:
155,112,143 ÷ 2 = 77,556,071.5
If the quotient is a whole number, then 2 and 77,556,071.5 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 | 155,112,143 | |
| -1 | -155,112,143 |
Now, we try dividing 155,112,143 by 3:
155,112,143 ÷ 3 = 51,704,047.6667
If the quotient is a whole number, then 3 and 51,704,047.6667 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 | 155,112,143 | |
| -1 | -155,112,143 |
Let's try dividing by 4:
155,112,143 ÷ 4 = 38,778,035.75
If the quotient is a whole number, then 4 and 38,778,035.75 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 | 155,112,143 | |
| -1 | 155,112,143 |
If you did it right, you will end up with this table:
| 1 | 19 | 41 | 83 | 779 | 1,577 | 2,399 | 3,403 | 45,581 | 64,657 | 98,359 | 199,117 | 1,868,821 | 3,783,223 | 8,163,797 | 155,112,143 |
| -1 | -19 | -41 | -83 | -779 | -1,577 | -2,399 | -3,403 | -45,581 | -64,657 | -98,359 | -199,117 | -1,868,821 | -3,783,223 | -8,163,797 | -155,112,143 |
Here are some more numbers to try:
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