A:
Positive:
1 x 151050555 x 30210117 x 215786535 x 431573101 x 149555505 x 29911707 x 213653535 x 4273
Negative:
-1 x -15105055-5 x -3021011-7 x -2157865-35 x -431573-101 x -149555-505 x -29911-707 x -21365-3535 x -4273
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 15,105,055, 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 | 15,105,055 | |
| -1 | -15,105,055 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,105,055.
Example:
1 x 15,105,055 = 15,105,055
and
-1 x -15,105,055 = 15,105,055
Notice both answers equal 15,105,055
With that explanation out of the way, let's continue. Next, we take the number 15,105,055 and divide it by 2:
15,105,055 ÷ 2 = 7,552,527.5
If the quotient is a whole number, then 2 and 7,552,527.5 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 | 15,105,055 | |
| -1 | -15,105,055 |
Now, we try dividing 15,105,055 by 3:
15,105,055 ÷ 3 = 5,035,018.3333
If the quotient is a whole number, then 3 and 5,035,018.3333 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 | 15,105,055 | |
| -1 | -15,105,055 |
Let's try dividing by 4:
15,105,055 ÷ 4 = 3,776,263.75
If the quotient is a whole number, then 4 and 3,776,263.75 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 | 15,105,055 | |
| -1 | 15,105,055 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 101 | 505 | 707 | 3,535 | 4,273 | 21,365 | 29,911 | 149,555 | 431,573 | 2,157,865 | 3,021,011 | 15,105,055 |
| -1 | -5 | -7 | -35 | -101 | -505 | -707 | -3,535 | -4,273 | -21,365 | -29,911 | -149,555 | -431,573 | -2,157,865 | -3,021,011 | -15,105,055 |
Here are some more numbers to try:
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