A:
Positive:
1 x 154803955 x 30960797 x 221148535 x 442297257 x 602351285 x 120471721 x 89951799 x 8605
Negative:
-1 x -15480395-5 x -3096079-7 x -2211485-35 x -442297-257 x -60235-1285 x -12047-1721 x -8995-1799 x -8605
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 15,480,395, 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 | 15,480,395 | |
| -1 | -15,480,395 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,480,395.
Example:
1 x 15,480,395 = 15,480,395
and
-1 x -15,480,395 = 15,480,395
Notice both answers equal 15,480,395
With that explanation out of the way, let's continue. Next, we take the number 15,480,395 and divide it by 2:
15,480,395 ÷ 2 = 7,740,197.5
If the quotient is a whole number, then 2 and 7,740,197.5 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 | 15,480,395 | |
| -1 | -15,480,395 |
Now, we try dividing 15,480,395 by 3:
15,480,395 ÷ 3 = 5,160,131.6667
If the quotient is a whole number, then 3 and 5,160,131.6667 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 | 15,480,395 | |
| -1 | -15,480,395 |
Let's try dividing by 4:
15,480,395 ÷ 4 = 3,870,098.75
If the quotient is a whole number, then 4 and 3,870,098.75 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 | 15,480,395 | |
| -1 | 15,480,395 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 257 | 1,285 | 1,721 | 1,799 | 8,605 | 8,995 | 12,047 | 60,235 | 442,297 | 2,211,485 | 3,096,079 | 15,480,395 |
| -1 | -5 | -7 | -35 | -257 | -1,285 | -1,721 | -1,799 | -8,605 | -8,995 | -12,047 | -60,235 | -442,297 | -2,211,485 | -3,096,079 | -15,480,395 |
Here are some more numbers to try:
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