A:
Positive:
1 x 138404055 x 276808137 x 37406579 x 175195185 x 74813395 x 35039947 x 146152923 x 4735
Negative:
-1 x -13840405-5 x -2768081-37 x -374065-79 x -175195-185 x -74813-395 x -35039-947 x -14615-2923 x -4735
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 13,840,405, 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 | 13,840,405 | |
| -1 | -13,840,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,840,405.
Example:
1 x 13,840,405 = 13,840,405
and
-1 x -13,840,405 = 13,840,405
Notice both answers equal 13,840,405
With that explanation out of the way, let's continue. Next, we take the number 13,840,405 and divide it by 2:
13,840,405 ÷ 2 = 6,920,202.5
If the quotient is a whole number, then 2 and 6,920,202.5 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 | 13,840,405 | |
| -1 | -13,840,405 |
Now, we try dividing 13,840,405 by 3:
13,840,405 ÷ 3 = 4,613,468.3333
If the quotient is a whole number, then 3 and 4,613,468.3333 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 | 13,840,405 | |
| -1 | -13,840,405 |
Let's try dividing by 4:
13,840,405 ÷ 4 = 3,460,101.25
If the quotient is a whole number, then 4 and 3,460,101.25 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 | 13,840,405 | |
| -1 | 13,840,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 37 | 79 | 185 | 395 | 947 | 2,923 | 4,735 | 14,615 | 35,039 | 74,813 | 175,195 | 374,065 | 2,768,081 | 13,840,405 |
| -1 | -5 | -37 | -79 | -185 | -395 | -947 | -2,923 | -4,735 | -14,615 | -35,039 | -74,813 | -175,195 | -374,065 | -2,768,081 | -13,840,405 |
Here are some more numbers to try:
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