A:
Positive:
1 x 181404855 x 362809711 x 164913555 x 32982761 x 297385305 x 59477671 x 270353355 x 5407
Negative:
-1 x -18140485-5 x -3628097-11 x -1649135-55 x -329827-61 x -297385-305 x -59477-671 x -27035-3355 x -5407
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 18,140,485, 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 | 18,140,485 | |
| -1 | -18,140,485 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,140,485.
Example:
1 x 18,140,485 = 18,140,485
and
-1 x -18,140,485 = 18,140,485
Notice both answers equal 18,140,485
With that explanation out of the way, let's continue. Next, we take the number 18,140,485 and divide it by 2:
18,140,485 ÷ 2 = 9,070,242.5
If the quotient is a whole number, then 2 and 9,070,242.5 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 | 18,140,485 | |
| -1 | -18,140,485 |
Now, we try dividing 18,140,485 by 3:
18,140,485 ÷ 3 = 6,046,828.3333
If the quotient is a whole number, then 3 and 6,046,828.3333 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 | 18,140,485 | |
| -1 | -18,140,485 |
Let's try dividing by 4:
18,140,485 ÷ 4 = 4,535,121.25
If the quotient is a whole number, then 4 and 4,535,121.25 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 | 18,140,485 | |
| -1 | 18,140,485 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 61 | 305 | 671 | 3,355 | 5,407 | 27,035 | 59,477 | 297,385 | 329,827 | 1,649,135 | 3,628,097 | 18,140,485 |
| -1 | -5 | -11 | -55 | -61 | -305 | -671 | -3,355 | -5,407 | -27,035 | -59,477 | -297,385 | -329,827 | -1,649,135 | -3,628,097 | -18,140,485 |
Here are some more numbers to try:
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