A:
Positive:
1 x 1538545917 x 90502719 x 80976123 x 668933109 x 141151323 x 47633361 x 42619391 x 39349437 x 352071853 x 83032071 x 74292507 x 6137
Negative:
-1 x -15385459-17 x -905027-19 x -809761-23 x -668933-109 x -141151-323 x -47633-361 x -42619-391 x -39349-437 x -35207-1853 x -8303-2071 x -7429-2507 x -6137
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 15,385,459, 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 | 15,385,459 | |
| -1 | -15,385,459 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,385,459.
Example:
1 x 15,385,459 = 15,385,459
and
-1 x -15,385,459 = 15,385,459
Notice both answers equal 15,385,459
With that explanation out of the way, let's continue. Next, we take the number 15,385,459 and divide it by 2:
15,385,459 ÷ 2 = 7,692,729.5
If the quotient is a whole number, then 2 and 7,692,729.5 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 | 15,385,459 | |
| -1 | -15,385,459 |
Now, we try dividing 15,385,459 by 3:
15,385,459 ÷ 3 = 5,128,486.3333
If the quotient is a whole number, then 3 and 5,128,486.3333 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 | 15,385,459 | |
| -1 | -15,385,459 |
Let's try dividing by 4:
15,385,459 ÷ 4 = 3,846,364.75
If the quotient is a whole number, then 4 and 3,846,364.75 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 | 15,385,459 | |
| -1 | 15,385,459 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 23 | 109 | 323 | 361 | 391 | 437 | 1,853 | 2,071 | 2,507 | 6,137 | 7,429 | 8,303 | 35,207 | 39,349 | 42,619 | 47,633 | 141,151 | 668,933 | 809,761 | 905,027 | 15,385,459 |
| -1 | -17 | -19 | -23 | -109 | -323 | -361 | -391 | -437 | -1,853 | -2,071 | -2,507 | -6,137 | -7,429 | -8,303 | -35,207 | -39,349 | -42,619 | -47,633 | -141,151 | -668,933 | -809,761 | -905,027 | -15,385,459 |
Here are some more numbers to try:
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