A:
Positive:
1 x 78176455 x 156352911 x 71069519 x 41145555 x 14213995 x 82291209 x 374051045 x 7481
Negative:
-1 x -7817645-5 x -1563529-11 x -710695-19 x -411455-55 x -142139-95 x -82291-209 x -37405-1045 x -7481
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 7,817,645, 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 | 7,817,645 | |
| -1 | -7,817,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,817,645.
Example:
1 x 7,817,645 = 7,817,645
and
-1 x -7,817,645 = 7,817,645
Notice both answers equal 7,817,645
With that explanation out of the way, let's continue. Next, we take the number 7,817,645 and divide it by 2:
7,817,645 ÷ 2 = 3,908,822.5
If the quotient is a whole number, then 2 and 3,908,822.5 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 | 7,817,645 | |
| -1 | -7,817,645 |
Now, we try dividing 7,817,645 by 3:
7,817,645 ÷ 3 = 2,605,881.6667
If the quotient is a whole number, then 3 and 2,605,881.6667 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 | 7,817,645 | |
| -1 | -7,817,645 |
Let's try dividing by 4:
7,817,645 ÷ 4 = 1,954,411.25
If the quotient is a whole number, then 4 and 1,954,411.25 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 | 7,817,645 | |
| -1 | 7,817,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 19 | 55 | 95 | 209 | 1,045 | 7,481 | 37,405 | 82,291 | 142,139 | 411,455 | 710,695 | 1,563,529 | 7,817,645 |
| -1 | -5 | -11 | -19 | -55 | -95 | -209 | -1,045 | -7,481 | -37,405 | -82,291 | -142,139 | -411,455 | -710,695 | -1,563,529 | -7,817,645 |
Here are some more numbers to try:
Try the factor calculator