A:
Positive:
1 x 154053255 x 308106513 x 118502525 x 61621365 x 237005107 x 143975325 x 47401443 x 34775535 x 287951391 x 110752215 x 69552675 x 5759
Negative:
-1 x -15405325-5 x -3081065-13 x -1185025-25 x -616213-65 x -237005-107 x -143975-325 x -47401-443 x -34775-535 x -28795-1391 x -11075-2215 x -6955-2675 x -5759
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 15,405,325, 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 | 15,405,325 | |
| -1 | -15,405,325 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,405,325.
Example:
1 x 15,405,325 = 15,405,325
and
-1 x -15,405,325 = 15,405,325
Notice both answers equal 15,405,325
With that explanation out of the way, let's continue. Next, we take the number 15,405,325 and divide it by 2:
15,405,325 ÷ 2 = 7,702,662.5
If the quotient is a whole number, then 2 and 7,702,662.5 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 | 15,405,325 | |
| -1 | -15,405,325 |
Now, we try dividing 15,405,325 by 3:
15,405,325 ÷ 3 = 5,135,108.3333
If the quotient is a whole number, then 3 and 5,135,108.3333 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 | 15,405,325 | |
| -1 | -15,405,325 |
Let's try dividing by 4:
15,405,325 ÷ 4 = 3,851,331.25
If the quotient is a whole number, then 4 and 3,851,331.25 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 | 15,405,325 | |
| -1 | 15,405,325 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 25 | 65 | 107 | 325 | 443 | 535 | 1,391 | 2,215 | 2,675 | 5,759 | 6,955 | 11,075 | 28,795 | 34,775 | 47,401 | 143,975 | 237,005 | 616,213 | 1,185,025 | 3,081,065 | 15,405,325 |
| -1 | -5 | -13 | -25 | -65 | -107 | -325 | -443 | -535 | -1,391 | -2,215 | -2,675 | -5,759 | -6,955 | -11,075 | -28,795 | -34,775 | -47,401 | -143,975 | -237,005 | -616,213 | -1,185,025 | -3,081,065 | -15,405,325 |
Here are some more numbers to try:
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