A:
Positive:
1 x 666202255 x 133240457 x 951717525 x 266480935 x 1903435175 x 380687199 x 334775995 x 669551393 x 478251913 x 348254975 x 133916965 x 9565
Negative:
-1 x -66620225-5 x -13324045-7 x -9517175-25 x -2664809-35 x -1903435-175 x -380687-199 x -334775-995 x -66955-1393 x -47825-1913 x -34825-4975 x -13391-6965 x -9565
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 66,620,225, 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 | 66,620,225 | |
| -1 | -66,620,225 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,620,225.
Example:
1 x 66,620,225 = 66,620,225
and
-1 x -66,620,225 = 66,620,225
Notice both answers equal 66,620,225
With that explanation out of the way, let's continue. Next, we take the number 66,620,225 and divide it by 2:
66,620,225 ÷ 2 = 33,310,112.5
If the quotient is a whole number, then 2 and 33,310,112.5 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 | 66,620,225 | |
| -1 | -66,620,225 |
Now, we try dividing 66,620,225 by 3:
66,620,225 ÷ 3 = 22,206,741.6667
If the quotient is a whole number, then 3 and 22,206,741.6667 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 | 66,620,225 | |
| -1 | -66,620,225 |
Let's try dividing by 4:
66,620,225 ÷ 4 = 16,655,056.25
If the quotient is a whole number, then 4 and 16,655,056.25 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 | 66,620,225 | |
| -1 | 66,620,225 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 175 | 199 | 995 | 1,393 | 1,913 | 4,975 | 6,965 | 9,565 | 13,391 | 34,825 | 47,825 | 66,955 | 334,775 | 380,687 | 1,903,435 | 2,664,809 | 9,517,175 | 13,324,045 | 66,620,225 |
| -1 | -5 | -7 | -25 | -35 | -175 | -199 | -995 | -1,393 | -1,913 | -4,975 | -6,965 | -9,565 | -13,391 | -34,825 | -47,825 | -66,955 | -334,775 | -380,687 | -1,903,435 | -2,664,809 | -9,517,175 | -13,324,045 | -66,620,225 |
Here are some more numbers to try:
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