A:
Positive:
1 x 665152255 x 133030457 x 950217525 x 266060935 x 1900435175 x 380087373 x 1783251019 x 652751865 x 356652611 x 254755095 x 130557133 x 9325
Negative:
-1 x -66515225-5 x -13303045-7 x -9502175-25 x -2660609-35 x -1900435-175 x -380087-373 x -178325-1019 x -65275-1865 x -35665-2611 x -25475-5095 x -13055-7133 x -9325
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 66,515,225, 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 | 66,515,225 | |
| -1 | -66,515,225 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,515,225.
Example:
1 x 66,515,225 = 66,515,225
and
-1 x -66,515,225 = 66,515,225
Notice both answers equal 66,515,225
With that explanation out of the way, let's continue. Next, we take the number 66,515,225 and divide it by 2:
66,515,225 ÷ 2 = 33,257,612.5
If the quotient is a whole number, then 2 and 33,257,612.5 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 | 66,515,225 | |
| -1 | -66,515,225 |
Now, we try dividing 66,515,225 by 3:
66,515,225 ÷ 3 = 22,171,741.6667
If the quotient is a whole number, then 3 and 22,171,741.6667 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 | 66,515,225 | |
| -1 | -66,515,225 |
Let's try dividing by 4:
66,515,225 ÷ 4 = 16,628,806.25
If the quotient is a whole number, then 4 and 16,628,806.25 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 | 66,515,225 | |
| -1 | 66,515,225 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 175 | 373 | 1,019 | 1,865 | 2,611 | 5,095 | 7,133 | 9,325 | 13,055 | 25,475 | 35,665 | 65,275 | 178,325 | 380,087 | 1,900,435 | 2,660,609 | 9,502,175 | 13,303,045 | 66,515,225 |
| -1 | -5 | -7 | -25 | -35 | -175 | -373 | -1,019 | -1,865 | -2,611 | -5,095 | -7,133 | -9,325 | -13,055 | -25,475 | -35,665 | -65,275 | -178,325 | -380,087 | -1,900,435 | -2,660,609 | -9,502,175 | -13,303,045 | -66,515,225 |
Here are some more numbers to try:
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