A:
Positive:
1 x 1557241555 x 3114483161 x 2552855103 x 1511885305 x 510571515 x 3023774957 x 314156283 x 24785
Negative:
-1 x -155724155-5 x -31144831-61 x -2552855-103 x -1511885-305 x -510571-515 x -302377-4957 x -31415-6283 x -24785
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 155,724,155, 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 | 155,724,155 | |
| -1 | -155,724,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,724,155.
Example:
1 x 155,724,155 = 155,724,155
and
-1 x -155,724,155 = 155,724,155
Notice both answers equal 155,724,155
With that explanation out of the way, let's continue. Next, we take the number 155,724,155 and divide it by 2:
155,724,155 ÷ 2 = 77,862,077.5
If the quotient is a whole number, then 2 and 77,862,077.5 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 | 155,724,155 | |
| -1 | -155,724,155 |
Now, we try dividing 155,724,155 by 3:
155,724,155 ÷ 3 = 51,908,051.6667
If the quotient is a whole number, then 3 and 51,908,051.6667 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 | 155,724,155 | |
| -1 | -155,724,155 |
Let's try dividing by 4:
155,724,155 ÷ 4 = 38,931,038.75
If the quotient is a whole number, then 4 and 38,931,038.75 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 | 155,724,155 | |
| -1 | 155,724,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 61 | 103 | 305 | 515 | 4,957 | 6,283 | 24,785 | 31,415 | 302,377 | 510,571 | 1,511,885 | 2,552,855 | 31,144,831 | 155,724,155 |
| -1 | -5 | -61 | -103 | -305 | -515 | -4,957 | -6,283 | -24,785 | -31,415 | -302,377 | -510,571 | -1,511,885 | -2,552,855 | -31,144,831 | -155,724,155 |
Here are some more numbers to try:
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