A:
Positive:
1 x 1024004055 x 2048008119 x 538949595 x 1077899617 x 1659651747 x 586153085 x 331938735 x 11723
Negative:
-1 x -102400405-5 x -20480081-19 x -5389495-95 x -1077899-617 x -165965-1747 x -58615-3085 x -33193-8735 x -11723
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 102,400,405, 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 | 102,400,405 | |
| -1 | -102,400,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 102,400,405.
Example:
1 x 102,400,405 = 102,400,405
and
-1 x -102,400,405 = 102,400,405
Notice both answers equal 102,400,405
With that explanation out of the way, let's continue. Next, we take the number 102,400,405 and divide it by 2:
102,400,405 ÷ 2 = 51,200,202.5
If the quotient is a whole number, then 2 and 51,200,202.5 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 | 102,400,405 | |
| -1 | -102,400,405 |
Now, we try dividing 102,400,405 by 3:
102,400,405 ÷ 3 = 34,133,468.3333
If the quotient is a whole number, then 3 and 34,133,468.3333 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 | 102,400,405 | |
| -1 | -102,400,405 |
Let's try dividing by 4:
102,400,405 ÷ 4 = 25,600,101.25
If the quotient is a whole number, then 4 and 25,600,101.25 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 | 102,400,405 | |
| -1 | 102,400,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 617 | 1,747 | 3,085 | 8,735 | 11,723 | 33,193 | 58,615 | 165,965 | 1,077,899 | 5,389,495 | 20,480,081 | 102,400,405 |
| -1 | -5 | -19 | -95 | -617 | -1,747 | -3,085 | -8,735 | -11,723 | -33,193 | -58,615 | -165,965 | -1,077,899 | -5,389,495 | -20,480,081 | -102,400,405 |
Here are some more numbers to try:
Try the factor calculator