A:
Positive:
1 x 152200155 x 304400317 x 89529585 x 179059137 x 111095685 x 222191307 x 116452329 x 6535
Negative:
-1 x -15220015-5 x -3044003-17 x -895295-85 x -179059-137 x -111095-685 x -22219-1307 x -11645-2329 x -6535
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 15,220,015, 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 | 15,220,015 | |
| -1 | -15,220,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,220,015.
Example:
1 x 15,220,015 = 15,220,015
and
-1 x -15,220,015 = 15,220,015
Notice both answers equal 15,220,015
With that explanation out of the way, let's continue. Next, we take the number 15,220,015 and divide it by 2:
15,220,015 ÷ 2 = 7,610,007.5
If the quotient is a whole number, then 2 and 7,610,007.5 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 | 15,220,015 | |
| -1 | -15,220,015 |
Now, we try dividing 15,220,015 by 3:
15,220,015 ÷ 3 = 5,073,338.3333
If the quotient is a whole number, then 3 and 5,073,338.3333 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 | 15,220,015 | |
| -1 | -15,220,015 |
Let's try dividing by 4:
15,220,015 ÷ 4 = 3,805,003.75
If the quotient is a whole number, then 4 and 3,805,003.75 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 | 15,220,015 | |
| -1 | 15,220,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 137 | 685 | 1,307 | 2,329 | 6,535 | 11,645 | 22,219 | 111,095 | 179,059 | 895,295 | 3,044,003 | 15,220,015 |
| -1 | -5 | -17 | -85 | -137 | -685 | -1,307 | -2,329 | -6,535 | -11,645 | -22,219 | -111,095 | -179,059 | -895,295 | -3,044,003 | -15,220,015 |
Here are some more numbers to try:
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