A:
Positive:
1 x 6150726655 x 12301453317 x 3618074585 x 7236149193 x 3186905965 x 6373813281 x 18746516405 x 37493
Negative:
-1 x -615072665-5 x -123014533-17 x -36180745-85 x -7236149-193 x -3186905-965 x -637381-3281 x -187465-16405 x -37493
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 615,072,665, 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 | 615,072,665 | |
| -1 | -615,072,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 615,072,665.
Example:
1 x 615,072,665 = 615,072,665
and
-1 x -615,072,665 = 615,072,665
Notice both answers equal 615,072,665
With that explanation out of the way, let's continue. Next, we take the number 615,072,665 and divide it by 2:
615,072,665 ÷ 2 = 307,536,332.5
If the quotient is a whole number, then 2 and 307,536,332.5 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 | 615,072,665 | |
| -1 | -615,072,665 |
Now, we try dividing 615,072,665 by 3:
615,072,665 ÷ 3 = 205,024,221.6667
If the quotient is a whole number, then 3 and 205,024,221.6667 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 | 615,072,665 | |
| -1 | -615,072,665 |
Let's try dividing by 4:
615,072,665 ÷ 4 = 153,768,166.25
If the quotient is a whole number, then 4 and 153,768,166.25 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 | 615,072,665 | |
| -1 | 615,072,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 193 | 965 | 3,281 | 16,405 | 37,493 | 187,465 | 637,381 | 3,186,905 | 7,236,149 | 36,180,745 | 123,014,533 | 615,072,665 |
| -1 | -5 | -17 | -85 | -193 | -965 | -3,281 | -16,405 | -37,493 | -187,465 | -637,381 | -3,186,905 | -7,236,149 | -36,180,745 | -123,014,533 | -615,072,665 |
Here are some more numbers to try:
Try the factor calculator