A:
Positive:
1 x 646455055 x 1292910119 x 340239595 x 680479137 x 471865685 x 943732603 x 248354967 x 13015
Negative:
-1 x -64645505-5 x -12929101-19 x -3402395-95 x -680479-137 x -471865-685 x -94373-2603 x -24835-4967 x -13015
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 64,645,505, 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 | 64,645,505 | |
| -1 | -64,645,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 64,645,505.
Example:
1 x 64,645,505 = 64,645,505
and
-1 x -64,645,505 = 64,645,505
Notice both answers equal 64,645,505
With that explanation out of the way, let's continue. Next, we take the number 64,645,505 and divide it by 2:
64,645,505 ÷ 2 = 32,322,752.5
If the quotient is a whole number, then 2 and 32,322,752.5 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 | 64,645,505 | |
| -1 | -64,645,505 |
Now, we try dividing 64,645,505 by 3:
64,645,505 ÷ 3 = 21,548,501.6667
If the quotient is a whole number, then 3 and 21,548,501.6667 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 | 64,645,505 | |
| -1 | -64,645,505 |
Let's try dividing by 4:
64,645,505 ÷ 4 = 16,161,376.25
If the quotient is a whole number, then 4 and 16,161,376.25 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 | 64,645,505 | |
| -1 | 64,645,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 137 | 685 | 2,603 | 4,967 | 13,015 | 24,835 | 94,373 | 471,865 | 680,479 | 3,402,395 | 12,929,101 | 64,645,505 |
| -1 | -5 | -19 | -95 | -137 | -685 | -2,603 | -4,967 | -13,015 | -24,835 | -94,373 | -471,865 | -680,479 | -3,402,395 | -12,929,101 | -64,645,505 |
Here are some more numbers to try:
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