A:
Positive:
1 x 648136455 x 1296272913 x 498566565 x 997133107 x 605735535 x 1211471391 x 465956955 x 9319
Negative:
-1 x -64813645-5 x -12962729-13 x -4985665-65 x -997133-107 x -605735-535 x -121147-1391 x -46595-6955 x -9319
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 64,813,645, 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 | 64,813,645 | |
| -1 | -64,813,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 64,813,645.
Example:
1 x 64,813,645 = 64,813,645
and
-1 x -64,813,645 = 64,813,645
Notice both answers equal 64,813,645
With that explanation out of the way, let's continue. Next, we take the number 64,813,645 and divide it by 2:
64,813,645 ÷ 2 = 32,406,822.5
If the quotient is a whole number, then 2 and 32,406,822.5 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 | 64,813,645 | |
| -1 | -64,813,645 |
Now, we try dividing 64,813,645 by 3:
64,813,645 ÷ 3 = 21,604,548.3333
If the quotient is a whole number, then 3 and 21,604,548.3333 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 | 64,813,645 | |
| -1 | -64,813,645 |
Let's try dividing by 4:
64,813,645 ÷ 4 = 16,203,411.25
If the quotient is a whole number, then 4 and 16,203,411.25 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 | 64,813,645 | |
| -1 | 64,813,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 107 | 535 | 1,391 | 6,955 | 9,319 | 46,595 | 121,147 | 605,735 | 997,133 | 4,985,665 | 12,962,729 | 64,813,645 |
| -1 | -5 | -13 | -65 | -107 | -535 | -1,391 | -6,955 | -9,319 | -46,595 | -121,147 | -605,735 | -997,133 | -4,985,665 | -12,962,729 | -64,813,645 |
Here are some more numbers to try:
Try the factor calculator