A:
Positive:
1 x 2111203255 x 4222406513 x 1624002525 x 844481343 x 490977565 x 3248005215 x 981955325 x 649601559 x 3776751075 x 1963912795 x 7553513975 x 15107
Negative:
-1 x -211120325-5 x -42224065-13 x -16240025-25 x -8444813-43 x -4909775-65 x -3248005-215 x -981955-325 x -649601-559 x -377675-1075 x -196391-2795 x -75535-13975 x -15107
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 211,120,325, 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 | 211,120,325 | |
| -1 | -211,120,325 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 211,120,325.
Example:
1 x 211,120,325 = 211,120,325
and
-1 x -211,120,325 = 211,120,325
Notice both answers equal 211,120,325
With that explanation out of the way, let's continue. Next, we take the number 211,120,325 and divide it by 2:
211,120,325 ÷ 2 = 105,560,162.5
If the quotient is a whole number, then 2 and 105,560,162.5 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 | 211,120,325 | |
| -1 | -211,120,325 |
Now, we try dividing 211,120,325 by 3:
211,120,325 ÷ 3 = 70,373,441.6667
If the quotient is a whole number, then 3 and 70,373,441.6667 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 | 211,120,325 | |
| -1 | -211,120,325 |
Let's try dividing by 4:
211,120,325 ÷ 4 = 52,780,081.25
If the quotient is a whole number, then 4 and 52,780,081.25 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 | 211,120,325 | |
| -1 | 211,120,325 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 25 | 43 | 65 | 215 | 325 | 559 | 1,075 | 2,795 | 13,975 | 15,107 | 75,535 | 196,391 | 377,675 | 649,601 | 981,955 | 3,248,005 | 4,909,775 | 8,444,813 | 16,240,025 | 42,224,065 | 211,120,325 |
| -1 | -5 | -13 | -25 | -43 | -65 | -215 | -325 | -559 | -1,075 | -2,795 | -13,975 | -15,107 | -75,535 | -196,391 | -377,675 | -649,601 | -981,955 | -3,248,005 | -4,909,775 | -8,444,813 | -16,240,025 | -42,224,065 | -211,120,325 |
Here are some more numbers to try:
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