A:
Positive:
1 x 661857777 x 945511117 x 389328183 x 797419119 x 556183581 x 1139171411 x 469076701 x 9877
Negative:
-1 x -66185777-7 x -9455111-17 x -3893281-83 x -797419-119 x -556183-581 x -113917-1411 x -46907-6701 x -9877
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 66,185,777, 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 | 66,185,777 | |
| -1 | -66,185,777 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,185,777.
Example:
1 x 66,185,777 = 66,185,777
and
-1 x -66,185,777 = 66,185,777
Notice both answers equal 66,185,777
With that explanation out of the way, let's continue. Next, we take the number 66,185,777 and divide it by 2:
66,185,777 ÷ 2 = 33,092,888.5
If the quotient is a whole number, then 2 and 33,092,888.5 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 | 66,185,777 | |
| -1 | -66,185,777 |
Now, we try dividing 66,185,777 by 3:
66,185,777 ÷ 3 = 22,061,925.6667
If the quotient is a whole number, then 3 and 22,061,925.6667 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 | 66,185,777 | |
| -1 | -66,185,777 |
Let's try dividing by 4:
66,185,777 ÷ 4 = 16,546,444.25
If the quotient is a whole number, then 4 and 16,546,444.25 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 | 66,185,777 | |
| -1 | 66,185,777 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 83 | 119 | 581 | 1,411 | 6,701 | 9,877 | 46,907 | 113,917 | 556,183 | 797,419 | 3,893,281 | 9,455,111 | 66,185,777 |
| -1 | -7 | -17 | -83 | -119 | -581 | -1,411 | -6,701 | -9,877 | -46,907 | -113,917 | -556,183 | -797,419 | -3,893,281 | -9,455,111 | -66,185,777 |
Here are some more numbers to try:
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