A:
Positive:
1 x 184018255 x 368036513 x 141552525 x 73607341 x 44882565 x 283105205 x 89765325 x 56621533 x 345251025 x 179531381 x 133252665 x 6905
Negative:
-1 x -18401825-5 x -3680365-13 x -1415525-25 x -736073-41 x -448825-65 x -283105-205 x -89765-325 x -56621-533 x -34525-1025 x -17953-1381 x -13325-2665 x -6905
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 18,401,825, 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 | 18,401,825 | |
| -1 | -18,401,825 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,401,825.
Example:
1 x 18,401,825 = 18,401,825
and
-1 x -18,401,825 = 18,401,825
Notice both answers equal 18,401,825
With that explanation out of the way, let's continue. Next, we take the number 18,401,825 and divide it by 2:
18,401,825 ÷ 2 = 9,200,912.5
If the quotient is a whole number, then 2 and 9,200,912.5 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 | 18,401,825 | |
| -1 | -18,401,825 |
Now, we try dividing 18,401,825 by 3:
18,401,825 ÷ 3 = 6,133,941.6667
If the quotient is a whole number, then 3 and 6,133,941.6667 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 | 18,401,825 | |
| -1 | -18,401,825 |
Let's try dividing by 4:
18,401,825 ÷ 4 = 4,600,456.25
If the quotient is a whole number, then 4 and 4,600,456.25 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 | 18,401,825 | |
| -1 | 18,401,825 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 25 | 41 | 65 | 205 | 325 | 533 | 1,025 | 1,381 | 2,665 | 6,905 | 13,325 | 17,953 | 34,525 | 56,621 | 89,765 | 283,105 | 448,825 | 736,073 | 1,415,525 | 3,680,365 | 18,401,825 |
| -1 | -5 | -13 | -25 | -41 | -65 | -205 | -325 | -533 | -1,025 | -1,381 | -2,665 | -6,905 | -13,325 | -17,953 | -34,525 | -56,621 | -89,765 | -283,105 | -448,825 | -736,073 | -1,415,525 | -3,680,365 | -18,401,825 |
Here are some more numbers to try:
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