A:
Positive:
1 x 663805455 x 132761097 x 948293511 x 603459535 x 189658749 x 135470555 x 120691977 x 862085245 x 270941385 x 172417539 x 1231552695 x 24631
Negative:
-1 x -66380545-5 x -13276109-7 x -9482935-11 x -6034595-35 x -1896587-49 x -1354705-55 x -1206919-77 x -862085-245 x -270941-385 x -172417-539 x -123155-2695 x -24631
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 66,380,545, 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 | 66,380,545 | |
| -1 | -66,380,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,380,545.
Example:
1 x 66,380,545 = 66,380,545
and
-1 x -66,380,545 = 66,380,545
Notice both answers equal 66,380,545
With that explanation out of the way, let's continue. Next, we take the number 66,380,545 and divide it by 2:
66,380,545 ÷ 2 = 33,190,272.5
If the quotient is a whole number, then 2 and 33,190,272.5 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 | 66,380,545 | |
| -1 | -66,380,545 |
Now, we try dividing 66,380,545 by 3:
66,380,545 ÷ 3 = 22,126,848.3333
If the quotient is a whole number, then 3 and 22,126,848.3333 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 | 66,380,545 | |
| -1 | -66,380,545 |
Let's try dividing by 4:
66,380,545 ÷ 4 = 16,595,136.25
If the quotient is a whole number, then 4 and 16,595,136.25 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 | 66,380,545 | |
| -1 | 66,380,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 49 | 55 | 77 | 245 | 385 | 539 | 2,695 | 24,631 | 123,155 | 172,417 | 270,941 | 862,085 | 1,206,919 | 1,354,705 | 1,896,587 | 6,034,595 | 9,482,935 | 13,276,109 | 66,380,545 |
| -1 | -5 | -7 | -11 | -35 | -49 | -55 | -77 | -245 | -385 | -539 | -2,695 | -24,631 | -123,155 | -172,417 | -270,941 | -862,085 | -1,206,919 | -1,354,705 | -1,896,587 | -6,034,595 | -9,482,935 | -13,276,109 | -66,380,545 |
Here are some more numbers to try:
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