A:
Positive:
1 x 1870840719 x 98465323 x 81340931 x 603497437 x 42811589 x 31763713 x 262391381 x 13547
Negative:
-1 x -18708407-19 x -984653-23 x -813409-31 x -603497-437 x -42811-589 x -31763-713 x -26239-1381 x -13547
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 18,708,407, 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 | 18,708,407 | |
| -1 | -18,708,407 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,708,407.
Example:
1 x 18,708,407 = 18,708,407
and
-1 x -18,708,407 = 18,708,407
Notice both answers equal 18,708,407
With that explanation out of the way, let's continue. Next, we take the number 18,708,407 and divide it by 2:
18,708,407 ÷ 2 = 9,354,203.5
If the quotient is a whole number, then 2 and 9,354,203.5 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 | 18,708,407 | |
| -1 | -18,708,407 |
Now, we try dividing 18,708,407 by 3:
18,708,407 ÷ 3 = 6,236,135.6667
If the quotient is a whole number, then 3 and 6,236,135.6667 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 | 18,708,407 | |
| -1 | -18,708,407 |
Let's try dividing by 4:
18,708,407 ÷ 4 = 4,677,101.75
If the quotient is a whole number, then 4 and 4,677,101.75 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 | 18,708,407 | |
| -1 | 18,708,407 |
If you did it right, you will end up with this table:
| 1 | 19 | 23 | 31 | 437 | 589 | 713 | 1,381 | 13,547 | 26,239 | 31,763 | 42,811 | 603,497 | 813,409 | 984,653 | 18,708,407 |
| -1 | -19 | -23 | -31 | -437 | -589 | -713 | -1,381 | -13,547 | -26,239 | -31,763 | -42,811 | -603,497 | -813,409 | -984,653 | -18,708,407 |
Here are some more numbers to try:
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