A:
Positive:
1 x 7650232155 x 15300464311 x 6954756555 x 13909513659 x 11608853295 x 2321777249 x 10553521107 x 36245
Negative:
-1 x -765023215-5 x -153004643-11 x -69547565-55 x -13909513-659 x -1160885-3295 x -232177-7249 x -105535-21107 x -36245
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 765,023,215, 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 | 765,023,215 | |
| -1 | -765,023,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 765,023,215.
Example:
1 x 765,023,215 = 765,023,215
and
-1 x -765,023,215 = 765,023,215
Notice both answers equal 765,023,215
With that explanation out of the way, let's continue. Next, we take the number 765,023,215 and divide it by 2:
765,023,215 ÷ 2 = 382,511,607.5
If the quotient is a whole number, then 2 and 382,511,607.5 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 | 765,023,215 | |
| -1 | -765,023,215 |
Now, we try dividing 765,023,215 by 3:
765,023,215 ÷ 3 = 255,007,738.3333
If the quotient is a whole number, then 3 and 255,007,738.3333 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 | 765,023,215 | |
| -1 | -765,023,215 |
Let's try dividing by 4:
765,023,215 ÷ 4 = 191,255,803.75
If the quotient is a whole number, then 4 and 191,255,803.75 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 | 765,023,215 | |
| -1 | 765,023,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 659 | 3,295 | 7,249 | 21,107 | 36,245 | 105,535 | 232,177 | 1,160,885 | 13,909,513 | 69,547,565 | 153,004,643 | 765,023,215 |
| -1 | -5 | -11 | -55 | -659 | -3,295 | -7,249 | -21,107 | -36,245 | -105,535 | -232,177 | -1,160,885 | -13,909,513 | -69,547,565 | -153,004,643 | -765,023,215 |
Here are some more numbers to try:
Try the factor calculator