A:
Positive:
1 x 1665066417 x 2378666379 x 2107679211 x 789131553 x 3010971427 x 1166831477 x 1127339989 x 16669
Negative:
-1 x -166506641-7 x -23786663-79 x -2107679-211 x -789131-553 x -301097-1427 x -116683-1477 x -112733-9989 x -16669
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 166,506,641, 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 | 166,506,641 | |
| -1 | -166,506,641 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 166,506,641.
Example:
1 x 166,506,641 = 166,506,641
and
-1 x -166,506,641 = 166,506,641
Notice both answers equal 166,506,641
With that explanation out of the way, let's continue. Next, we take the number 166,506,641 and divide it by 2:
166,506,641 ÷ 2 = 83,253,320.5
If the quotient is a whole number, then 2 and 83,253,320.5 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 | 166,506,641 | |
| -1 | -166,506,641 |
Now, we try dividing 166,506,641 by 3:
166,506,641 ÷ 3 = 55,502,213.6667
If the quotient is a whole number, then 3 and 55,502,213.6667 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 | 166,506,641 | |
| -1 | -166,506,641 |
Let's try dividing by 4:
166,506,641 ÷ 4 = 41,626,660.25
If the quotient is a whole number, then 4 and 41,626,660.25 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 | 166,506,641 | |
| -1 | 166,506,641 |
If you did it right, you will end up with this table:
| 1 | 7 | 79 | 211 | 553 | 1,427 | 1,477 | 9,989 | 16,669 | 112,733 | 116,683 | 301,097 | 789,131 | 2,107,679 | 23,786,663 | 166,506,641 |
| -1 | -7 | -79 | -211 | -553 | -1,427 | -1,477 | -9,989 | -16,669 | -112,733 | -116,683 | -301,097 | -789,131 | -2,107,679 | -23,786,663 | -166,506,641 |
Here are some more numbers to try:
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