A:
Positive:
1 x 130432155 x 260864319 x 68648595 x 137297251 x 51965547 x 238451255 x 103932735 x 4769
Negative:
-1 x -13043215-5 x -2608643-19 x -686485-95 x -137297-251 x -51965-547 x -23845-1255 x -10393-2735 x -4769
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 13,043,215, 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 | 13,043,215 | |
| -1 | -13,043,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,043,215.
Example:
1 x 13,043,215 = 13,043,215
and
-1 x -13,043,215 = 13,043,215
Notice both answers equal 13,043,215
With that explanation out of the way, let's continue. Next, we take the number 13,043,215 and divide it by 2:
13,043,215 ÷ 2 = 6,521,607.5
If the quotient is a whole number, then 2 and 6,521,607.5 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 | 13,043,215 | |
| -1 | -13,043,215 |
Now, we try dividing 13,043,215 by 3:
13,043,215 ÷ 3 = 4,347,738.3333
If the quotient is a whole number, then 3 and 4,347,738.3333 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 | 13,043,215 | |
| -1 | -13,043,215 |
Let's try dividing by 4:
13,043,215 ÷ 4 = 3,260,803.75
If the quotient is a whole number, then 4 and 3,260,803.75 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 | 13,043,215 | |
| -1 | 13,043,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 251 | 547 | 1,255 | 2,735 | 4,769 | 10,393 | 23,845 | 51,965 | 137,297 | 686,485 | 2,608,643 | 13,043,215 |
| -1 | -5 | -19 | -95 | -251 | -547 | -1,255 | -2,735 | -4,769 | -10,393 | -23,845 | -51,965 | -137,297 | -686,485 | -2,608,643 | -13,043,215 |
Here are some more numbers to try:
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