A:
Positive:
1 x 155176455 x 310352911 x 141069513 x 119366555 x 28213965 x 238733121 x 128245143 x 108515605 x 25649715 x 217031573 x 98651973 x 7865
Negative:
-1 x -15517645-5 x -3103529-11 x -1410695-13 x -1193665-55 x -282139-65 x -238733-121 x -128245-143 x -108515-605 x -25649-715 x -21703-1573 x -9865-1973 x -7865
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 15,517,645, 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 | 15,517,645 | |
| -1 | -15,517,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,517,645.
Example:
1 x 15,517,645 = 15,517,645
and
-1 x -15,517,645 = 15,517,645
Notice both answers equal 15,517,645
With that explanation out of the way, let's continue. Next, we take the number 15,517,645 and divide it by 2:
15,517,645 ÷ 2 = 7,758,822.5
If the quotient is a whole number, then 2 and 7,758,822.5 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 | 15,517,645 | |
| -1 | -15,517,645 |
Now, we try dividing 15,517,645 by 3:
15,517,645 ÷ 3 = 5,172,548.3333
If the quotient is a whole number, then 3 and 5,172,548.3333 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 | 15,517,645 | |
| -1 | -15,517,645 |
Let's try dividing by 4:
15,517,645 ÷ 4 = 3,879,411.25
If the quotient is a whole number, then 4 and 3,879,411.25 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 | 15,517,645 | |
| -1 | 15,517,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 13 | 55 | 65 | 121 | 143 | 605 | 715 | 1,573 | 1,973 | 7,865 | 9,865 | 21,703 | 25,649 | 108,515 | 128,245 | 238,733 | 282,139 | 1,193,665 | 1,410,695 | 3,103,529 | 15,517,645 |
| -1 | -5 | -11 | -13 | -55 | -65 | -121 | -143 | -605 | -715 | -1,573 | -1,973 | -7,865 | -9,865 | -21,703 | -25,649 | -108,515 | -128,245 | -238,733 | -282,139 | -1,193,665 | -1,410,695 | -3,103,529 | -15,517,645 |
Here are some more numbers to try:
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