A:
Positive:
1 x 668514777 x 955021111 x 607740777 x 868201769 x 869331129 x 592135383 x 124197903 x 8459
Negative:
-1 x -66851477-7 x -9550211-11 x -6077407-77 x -868201-769 x -86933-1129 x -59213-5383 x -12419-7903 x -8459
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 66,851,477, 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 | 66,851,477 | |
| -1 | -66,851,477 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,851,477.
Example:
1 x 66,851,477 = 66,851,477
and
-1 x -66,851,477 = 66,851,477
Notice both answers equal 66,851,477
With that explanation out of the way, let's continue. Next, we take the number 66,851,477 and divide it by 2:
66,851,477 ÷ 2 = 33,425,738.5
If the quotient is a whole number, then 2 and 33,425,738.5 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 | 66,851,477 | |
| -1 | -66,851,477 |
Now, we try dividing 66,851,477 by 3:
66,851,477 ÷ 3 = 22,283,825.6667
If the quotient is a whole number, then 3 and 22,283,825.6667 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 | 66,851,477 | |
| -1 | -66,851,477 |
Let's try dividing by 4:
66,851,477 ÷ 4 = 16,712,869.25
If the quotient is a whole number, then 4 and 16,712,869.25 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 | 66,851,477 | |
| -1 | 66,851,477 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 769 | 1,129 | 5,383 | 7,903 | 8,459 | 12,419 | 59,213 | 86,933 | 868,201 | 6,077,407 | 9,550,211 | 66,851,477 |
| -1 | -7 | -11 | -77 | -769 | -1,129 | -5,383 | -7,903 | -8,459 | -12,419 | -59,213 | -86,933 | -868,201 | -6,077,407 | -9,550,211 | -66,851,477 |
Here are some more numbers to try:
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