A:
Positive:
1 x 646668555 x 1293337111 x 587880555 x 1175761587 x 1101652003 x 322852935 x 220336457 x 10015
Negative:
-1 x -64666855-5 x -12933371-11 x -5878805-55 x -1175761-587 x -110165-2003 x -32285-2935 x -22033-6457 x -10015
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 64,666,855, 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 | 64,666,855 | |
| -1 | -64,666,855 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 64,666,855.
Example:
1 x 64,666,855 = 64,666,855
and
-1 x -64,666,855 = 64,666,855
Notice both answers equal 64,666,855
With that explanation out of the way, let's continue. Next, we take the number 64,666,855 and divide it by 2:
64,666,855 ÷ 2 = 32,333,427.5
If the quotient is a whole number, then 2 and 32,333,427.5 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 | 64,666,855 | |
| -1 | -64,666,855 |
Now, we try dividing 64,666,855 by 3:
64,666,855 ÷ 3 = 21,555,618.3333
If the quotient is a whole number, then 3 and 21,555,618.3333 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 | 64,666,855 | |
| -1 | -64,666,855 |
Let's try dividing by 4:
64,666,855 ÷ 4 = 16,166,713.75
If the quotient is a whole number, then 4 and 16,166,713.75 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 | 64,666,855 | |
| -1 | 64,666,855 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 587 | 2,003 | 2,935 | 6,457 | 10,015 | 22,033 | 32,285 | 110,165 | 1,175,761 | 5,878,805 | 12,933,371 | 64,666,855 |
| -1 | -5 | -11 | -55 | -587 | -2,003 | -2,935 | -6,457 | -10,015 | -22,033 | -32,285 | -110,165 | -1,175,761 | -5,878,805 | -12,933,371 | -64,666,855 |
Here are some more numbers to try:
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