A:
Positive:
1 x 666155655 x 1332311379 x 843235137 x 486245395 x 168647685 x 972491231 x 541156155 x 10823
Negative:
-1 x -66615565-5 x -13323113-79 x -843235-137 x -486245-395 x -168647-685 x -97249-1231 x -54115-6155 x -10823
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 66,615,565, 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 | 66,615,565 | |
| -1 | -66,615,565 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,615,565.
Example:
1 x 66,615,565 = 66,615,565
and
-1 x -66,615,565 = 66,615,565
Notice both answers equal 66,615,565
With that explanation out of the way, let's continue. Next, we take the number 66,615,565 and divide it by 2:
66,615,565 ÷ 2 = 33,307,782.5
If the quotient is a whole number, then 2 and 33,307,782.5 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 | 66,615,565 | |
| -1 | -66,615,565 |
Now, we try dividing 66,615,565 by 3:
66,615,565 ÷ 3 = 22,205,188.3333
If the quotient is a whole number, then 3 and 22,205,188.3333 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 | 66,615,565 | |
| -1 | -66,615,565 |
Let's try dividing by 4:
66,615,565 ÷ 4 = 16,653,891.25
If the quotient is a whole number, then 4 and 16,653,891.25 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 | 66,615,565 | |
| -1 | 66,615,565 |
If you did it right, you will end up with this table:
| 1 | 5 | 79 | 137 | 395 | 685 | 1,231 | 6,155 | 10,823 | 54,115 | 97,249 | 168,647 | 486,245 | 843,235 | 13,323,113 | 66,615,565 |
| -1 | -5 | -79 | -137 | -395 | -685 | -1,231 | -6,155 | -10,823 | -54,115 | -97,249 | -168,647 | -486,245 | -843,235 | -13,323,113 | -66,615,565 |
Here are some more numbers to try:
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