A:
Positive:
1 x 153232155 x 306464319 x 80648595 x 161297101 x 151715505 x 303431597 x 95951919 x 7985
Negative:
-1 x -15323215-5 x -3064643-19 x -806485-95 x -161297-101 x -151715-505 x -30343-1597 x -9595-1919 x -7985
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 15,323,215, 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 | 15,323,215 | |
| -1 | -15,323,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,323,215.
Example:
1 x 15,323,215 = 15,323,215
and
-1 x -15,323,215 = 15,323,215
Notice both answers equal 15,323,215
With that explanation out of the way, let's continue. Next, we take the number 15,323,215 and divide it by 2:
15,323,215 ÷ 2 = 7,661,607.5
If the quotient is a whole number, then 2 and 7,661,607.5 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 | 15,323,215 | |
| -1 | -15,323,215 |
Now, we try dividing 15,323,215 by 3:
15,323,215 ÷ 3 = 5,107,738.3333
If the quotient is a whole number, then 3 and 5,107,738.3333 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 | 15,323,215 | |
| -1 | -15,323,215 |
Let's try dividing by 4:
15,323,215 ÷ 4 = 3,830,803.75
If the quotient is a whole number, then 4 and 3,830,803.75 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 | 15,323,215 | |
| -1 | 15,323,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 101 | 505 | 1,597 | 1,919 | 7,985 | 9,595 | 30,343 | 151,715 | 161,297 | 806,485 | 3,064,643 | 15,323,215 |
| -1 | -5 | -19 | -95 | -101 | -505 | -1,597 | -1,919 | -7,985 | -9,595 | -30,343 | -151,715 | -161,297 | -806,485 | -3,064,643 | -15,323,215 |
Here are some more numbers to try:
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