A:
Positive:
1 x 180154737 x 257363959 x 305347181 x 99533241 x 74753413 x 436211267 x 142191687 x 10679
Negative:
-1 x -18015473-7 x -2573639-59 x -305347-181 x -99533-241 x -74753-413 x -43621-1267 x -14219-1687 x -10679
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 18,015,473, 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 | 18,015,473 | |
| -1 | -18,015,473 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,015,473.
Example:
1 x 18,015,473 = 18,015,473
and
-1 x -18,015,473 = 18,015,473
Notice both answers equal 18,015,473
With that explanation out of the way, let's continue. Next, we take the number 18,015,473 and divide it by 2:
18,015,473 ÷ 2 = 9,007,736.5
If the quotient is a whole number, then 2 and 9,007,736.5 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 | 18,015,473 | |
| -1 | -18,015,473 |
Now, we try dividing 18,015,473 by 3:
18,015,473 ÷ 3 = 6,005,157.6667
If the quotient is a whole number, then 3 and 6,005,157.6667 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 | 18,015,473 | |
| -1 | -18,015,473 |
Let's try dividing by 4:
18,015,473 ÷ 4 = 4,503,868.25
If the quotient is a whole number, then 4 and 4,503,868.25 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 | 18,015,473 | |
| -1 | 18,015,473 |
If you did it right, you will end up with this table:
| 1 | 7 | 59 | 181 | 241 | 413 | 1,267 | 1,687 | 10,679 | 14,219 | 43,621 | 74,753 | 99,533 | 305,347 | 2,573,639 | 18,015,473 |
| -1 | -7 | -59 | -181 | -241 | -413 | -1,267 | -1,687 | -10,679 | -14,219 | -43,621 | -74,753 | -99,533 | -305,347 | -2,573,639 | -18,015,473 |
Here are some more numbers to try:
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