A:
Positive:
1 x 1668401217 x 2383430319 x 8781059103 x 1619807133 x 1254437361 x 462161641 x 260281721 x 2314011957 x 852532527 x 660234487 x 3718312179 x 13699
Negative:
-1 x -166840121-7 x -23834303-19 x -8781059-103 x -1619807-133 x -1254437-361 x -462161-641 x -260281-721 x -231401-1957 x -85253-2527 x -66023-4487 x -37183-12179 x -13699
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 166,840,121, 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 | 166,840,121 | |
| -1 | -166,840,121 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 166,840,121.
Example:
1 x 166,840,121 = 166,840,121
and
-1 x -166,840,121 = 166,840,121
Notice both answers equal 166,840,121
With that explanation out of the way, let's continue. Next, we take the number 166,840,121 and divide it by 2:
166,840,121 ÷ 2 = 83,420,060.5
If the quotient is a whole number, then 2 and 83,420,060.5 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 | 166,840,121 | |
| -1 | -166,840,121 |
Now, we try dividing 166,840,121 by 3:
166,840,121 ÷ 3 = 55,613,373.6667
If the quotient is a whole number, then 3 and 55,613,373.6667 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 | 166,840,121 | |
| -1 | -166,840,121 |
Let's try dividing by 4:
166,840,121 ÷ 4 = 41,710,030.25
If the quotient is a whole number, then 4 and 41,710,030.25 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 | 166,840,121 | |
| -1 | 166,840,121 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 103 | 133 | 361 | 641 | 721 | 1,957 | 2,527 | 4,487 | 12,179 | 13,699 | 37,183 | 66,023 | 85,253 | 231,401 | 260,281 | 462,161 | 1,254,437 | 1,619,807 | 8,781,059 | 23,834,303 | 166,840,121 |
| -1 | -7 | -19 | -103 | -133 | -361 | -641 | -721 | -1,957 | -2,527 | -4,487 | -12,179 | -13,699 | -37,183 | -66,023 | -85,253 | -231,401 | -260,281 | -462,161 | -1,254,437 | -1,619,807 | -8,781,059 | -23,834,303 | -166,840,121 |
Here are some more numbers to try:
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