A:
Positive:
1 x 156020155 x 312040311 x 141836513 x 120015555 x 28367365 x 240031143 x 109105715 x 21821
Negative:
-1 x -15602015-5 x -3120403-11 x -1418365-13 x -1200155-55 x -283673-65 x -240031-143 x -109105-715 x -21821
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 15,602,015, 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 | 15,602,015 | |
| -1 | -15,602,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,602,015.
Example:
1 x 15,602,015 = 15,602,015
and
-1 x -15,602,015 = 15,602,015
Notice both answers equal 15,602,015
With that explanation out of the way, let's continue. Next, we take the number 15,602,015 and divide it by 2:
15,602,015 ÷ 2 = 7,801,007.5
If the quotient is a whole number, then 2 and 7,801,007.5 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 | 15,602,015 | |
| -1 | -15,602,015 |
Now, we try dividing 15,602,015 by 3:
15,602,015 ÷ 3 = 5,200,671.6667
If the quotient is a whole number, then 3 and 5,200,671.6667 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 | 15,602,015 | |
| -1 | -15,602,015 |
Let's try dividing by 4:
15,602,015 ÷ 4 = 3,900,503.75
If the quotient is a whole number, then 4 and 3,900,503.75 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 | 15,602,015 | |
| -1 | 15,602,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 13 | 55 | 65 | 143 | 715 | 21,821 | 109,105 | 240,031 | 283,673 | 1,200,155 | 1,418,365 | 3,120,403 | 15,602,015 |
| -1 | -5 | -11 | -13 | -55 | -65 | -143 | -715 | -21,821 | -109,105 | -240,031 | -283,673 | -1,200,155 | -1,418,365 | -3,120,403 | -15,602,015 |
Here are some more numbers to try:
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