A:
Positive:
1 x 646635555 x 1293271111 x 587850519 x 340334555 x 117570195 x 680669209 x 3093951045 x 61879
Negative:
-1 x -64663555-5 x -12932711-11 x -5878505-19 x -3403345-55 x -1175701-95 x -680669-209 x -309395-1045 x -61879
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 64,663,555, 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 | 64,663,555 | |
| -1 | -64,663,555 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 64,663,555.
Example:
1 x 64,663,555 = 64,663,555
and
-1 x -64,663,555 = 64,663,555
Notice both answers equal 64,663,555
With that explanation out of the way, let's continue. Next, we take the number 64,663,555 and divide it by 2:
64,663,555 ÷ 2 = 32,331,777.5
If the quotient is a whole number, then 2 and 32,331,777.5 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 | 64,663,555 | |
| -1 | -64,663,555 |
Now, we try dividing 64,663,555 by 3:
64,663,555 ÷ 3 = 21,554,518.3333
If the quotient is a whole number, then 3 and 21,554,518.3333 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 | 64,663,555 | |
| -1 | -64,663,555 |
Let's try dividing by 4:
64,663,555 ÷ 4 = 16,165,888.75
If the quotient is a whole number, then 4 and 16,165,888.75 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 | 64,663,555 | |
| -1 | 64,663,555 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 19 | 55 | 95 | 209 | 1,045 | 61,879 | 309,395 | 680,669 | 1,175,701 | 3,403,345 | 5,878,505 | 12,932,711 | 64,663,555 |
| -1 | -5 | -11 | -19 | -55 | -95 | -209 | -1,045 | -61,879 | -309,395 | -680,669 | -1,175,701 | -3,403,345 | -5,878,505 | -12,932,711 | -64,663,555 |
Here are some more numbers to try:
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