A:
Positive:
1 x 6158488855 x 12316977717 x 3622640585 x 7245281289 x 21309651445 x 426193
Negative:
-1 x -615848885-5 x -123169777-17 x -36226405-85 x -7245281-289 x -2130965-1445 x -426193
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 615,848,885, 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 | 615,848,885 | |
| -1 | -615,848,885 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 615,848,885.
Example:
1 x 615,848,885 = 615,848,885
and
-1 x -615,848,885 = 615,848,885
Notice both answers equal 615,848,885
With that explanation out of the way, let's continue. Next, we take the number 615,848,885 and divide it by 2:
615,848,885 ÷ 2 = 307,924,442.5
If the quotient is a whole number, then 2 and 307,924,442.5 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 | 615,848,885 | |
| -1 | -615,848,885 |
Now, we try dividing 615,848,885 by 3:
615,848,885 ÷ 3 = 205,282,961.6667
If the quotient is a whole number, then 3 and 205,282,961.6667 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 | 615,848,885 | |
| -1 | -615,848,885 |
Let's try dividing by 4:
615,848,885 ÷ 4 = 153,962,221.25
If the quotient is a whole number, then 4 and 153,962,221.25 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 | 615,848,885 | |
| -1 | 615,848,885 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 289 | 1,445 | 426,193 | 2,130,965 | 7,245,281 | 36,226,405 | 123,169,777 | 615,848,885 |
| -1 | -5 | -17 | -85 | -289 | -1,445 | -426,193 | -2,130,965 | -7,245,281 | -36,226,405 | -123,169,777 | -615,848,885 |
Here are some more numbers to try:
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