A:
Positive:
1 x 153889555 x 307779119 x 80994523 x 66908595 x 161989115 x 133817437 x 352152185 x 7043
Negative:
-1 x -15388955-5 x -3077791-19 x -809945-23 x -669085-95 x -161989-115 x -133817-437 x -35215-2185 x -7043
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 15,388,955, 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 | 15,388,955 | |
| -1 | -15,388,955 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,388,955.
Example:
1 x 15,388,955 = 15,388,955
and
-1 x -15,388,955 = 15,388,955
Notice both answers equal 15,388,955
With that explanation out of the way, let's continue. Next, we take the number 15,388,955 and divide it by 2:
15,388,955 ÷ 2 = 7,694,477.5
If the quotient is a whole number, then 2 and 7,694,477.5 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 | 15,388,955 | |
| -1 | -15,388,955 |
Now, we try dividing 15,388,955 by 3:
15,388,955 ÷ 3 = 5,129,651.6667
If the quotient is a whole number, then 3 and 5,129,651.6667 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 | 15,388,955 | |
| -1 | -15,388,955 |
Let's try dividing by 4:
15,388,955 ÷ 4 = 3,847,238.75
If the quotient is a whole number, then 4 and 3,847,238.75 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 | 15,388,955 | |
| -1 | 15,388,955 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 23 | 95 | 115 | 437 | 2,185 | 7,043 | 35,215 | 133,817 | 161,989 | 669,085 | 809,945 | 3,077,791 | 15,388,955 |
| -1 | -5 | -19 | -23 | -95 | -115 | -437 | -2,185 | -7,043 | -35,215 | -133,817 | -161,989 | -669,085 | -809,945 | -3,077,791 | -15,388,955 |
Here are some more numbers to try:
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