A:
Positive:
1 x 646517755 x 1293035519 x 340272525 x 258607195 x 680545131 x 493525475 x 136109655 x 987051039 x 622252489 x 259753275 x 197415195 x 12445
Negative:
-1 x -64651775-5 x -12930355-19 x -3402725-25 x -2586071-95 x -680545-131 x -493525-475 x -136109-655 x -98705-1039 x -62225-2489 x -25975-3275 x -19741-5195 x -12445
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 64,651,775, 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 | 64,651,775 | |
| -1 | -64,651,775 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 64,651,775.
Example:
1 x 64,651,775 = 64,651,775
and
-1 x -64,651,775 = 64,651,775
Notice both answers equal 64,651,775
With that explanation out of the way, let's continue. Next, we take the number 64,651,775 and divide it by 2:
64,651,775 ÷ 2 = 32,325,887.5
If the quotient is a whole number, then 2 and 32,325,887.5 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 | 64,651,775 | |
| -1 | -64,651,775 |
Now, we try dividing 64,651,775 by 3:
64,651,775 ÷ 3 = 21,550,591.6667
If the quotient is a whole number, then 3 and 21,550,591.6667 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 | 64,651,775 | |
| -1 | -64,651,775 |
Let's try dividing by 4:
64,651,775 ÷ 4 = 16,162,943.75
If the quotient is a whole number, then 4 and 16,162,943.75 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 | 64,651,775 | |
| -1 | 64,651,775 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 25 | 95 | 131 | 475 | 655 | 1,039 | 2,489 | 3,275 | 5,195 | 12,445 | 19,741 | 25,975 | 62,225 | 98,705 | 136,109 | 493,525 | 680,545 | 2,586,071 | 3,402,725 | 12,930,355 | 64,651,775 |
| -1 | -5 | -19 | -25 | -95 | -131 | -475 | -655 | -1,039 | -2,489 | -3,275 | -5,195 | -12,445 | -19,741 | -25,975 | -62,225 | -98,705 | -136,109 | -493,525 | -680,545 | -2,586,071 | -3,402,725 | -12,930,355 | -64,651,775 |
Here are some more numbers to try:
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