A:
Positive:
1 x 164054455 x 32810897 x 234363529 x 56570535 x 46872749 x 334805145 x 113141203 x 80815245 x 669611015 x 161631421 x 115452309 x 7105
Negative:
-1 x -16405445-5 x -3281089-7 x -2343635-29 x -565705-35 x -468727-49 x -334805-145 x -113141-203 x -80815-245 x -66961-1015 x -16163-1421 x -11545-2309 x -7105
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 16,405,445, 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 | 16,405,445 | |
| -1 | -16,405,445 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 16,405,445.
Example:
1 x 16,405,445 = 16,405,445
and
-1 x -16,405,445 = 16,405,445
Notice both answers equal 16,405,445
With that explanation out of the way, let's continue. Next, we take the number 16,405,445 and divide it by 2:
16,405,445 ÷ 2 = 8,202,722.5
If the quotient is a whole number, then 2 and 8,202,722.5 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 | 16,405,445 | |
| -1 | -16,405,445 |
Now, we try dividing 16,405,445 by 3:
16,405,445 ÷ 3 = 5,468,481.6667
If the quotient is a whole number, then 3 and 5,468,481.6667 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 | 16,405,445 | |
| -1 | -16,405,445 |
Let's try dividing by 4:
16,405,445 ÷ 4 = 4,101,361.25
If the quotient is a whole number, then 4 and 4,101,361.25 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 | 16,405,445 | |
| -1 | 16,405,445 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 29 | 35 | 49 | 145 | 203 | 245 | 1,015 | 1,421 | 2,309 | 7,105 | 11,545 | 16,163 | 66,961 | 80,815 | 113,141 | 334,805 | 468,727 | 565,705 | 2,343,635 | 3,281,089 | 16,405,445 |
| -1 | -5 | -7 | -29 | -35 | -49 | -145 | -203 | -245 | -1,015 | -1,421 | -2,309 | -7,105 | -11,545 | -16,163 | -66,961 | -80,815 | -113,141 | -334,805 | -468,727 | -565,705 | -2,343,635 | -3,281,089 | -16,405,445 |
Here are some more numbers to try:
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