A:
Positive:
1 x 2032431555 x 4064863143 x 472658561 x 3331855215 x 945317305 x 6663712623 x 7748513115 x 15497
Negative:
-1 x -203243155-5 x -40648631-43 x -4726585-61 x -3331855-215 x -945317-305 x -666371-2623 x -77485-13115 x -15497
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 203,243,155, 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 | 203,243,155 | |
| -1 | -203,243,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 203,243,155.
Example:
1 x 203,243,155 = 203,243,155
and
-1 x -203,243,155 = 203,243,155
Notice both answers equal 203,243,155
With that explanation out of the way, let's continue. Next, we take the number 203,243,155 and divide it by 2:
203,243,155 ÷ 2 = 101,621,577.5
If the quotient is a whole number, then 2 and 101,621,577.5 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 | 203,243,155 | |
| -1 | -203,243,155 |
Now, we try dividing 203,243,155 by 3:
203,243,155 ÷ 3 = 67,747,718.3333
If the quotient is a whole number, then 3 and 67,747,718.3333 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 | 203,243,155 | |
| -1 | -203,243,155 |
Let's try dividing by 4:
203,243,155 ÷ 4 = 50,810,788.75
If the quotient is a whole number, then 4 and 50,810,788.75 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 | 203,243,155 | |
| -1 | 203,243,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 43 | 61 | 215 | 305 | 2,623 | 13,115 | 15,497 | 77,485 | 666,371 | 945,317 | 3,331,855 | 4,726,585 | 40,648,631 | 203,243,155 |
| -1 | -5 | -43 | -61 | -215 | -305 | -2,623 | -13,115 | -15,497 | -77,485 | -666,371 | -945,317 | -3,331,855 | -4,726,585 | -40,648,631 | -203,243,155 |
Here are some more numbers to try:
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