A:
Positive:
1 x 64215255 x 128430511 x 58377519 x 33797525 x 25686155 x 11675595 x 67595209 x 30725275 x 23351475 x 135191045 x 61451229 x 5225
Negative:
-1 x -6421525-5 x -1284305-11 x -583775-19 x -337975-25 x -256861-55 x -116755-95 x -67595-209 x -30725-275 x -23351-475 x -13519-1045 x -6145-1229 x -5225
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 6,421,525, 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 | 6,421,525 | |
| -1 | -6,421,525 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 6,421,525.
Example:
1 x 6,421,525 = 6,421,525
and
-1 x -6,421,525 = 6,421,525
Notice both answers equal 6,421,525
With that explanation out of the way, let's continue. Next, we take the number 6,421,525 and divide it by 2:
6,421,525 ÷ 2 = 3,210,762.5
If the quotient is a whole number, then 2 and 3,210,762.5 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 | 6,421,525 | |
| -1 | -6,421,525 |
Now, we try dividing 6,421,525 by 3:
6,421,525 ÷ 3 = 2,140,508.3333
If the quotient is a whole number, then 3 and 2,140,508.3333 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 | 6,421,525 | |
| -1 | -6,421,525 |
Let's try dividing by 4:
6,421,525 ÷ 4 = 1,605,381.25
If the quotient is a whole number, then 4 and 1,605,381.25 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 | 6,421,525 | |
| -1 | 6,421,525 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 19 | 25 | 55 | 95 | 209 | 275 | 475 | 1,045 | 1,229 | 5,225 | 6,145 | 13,519 | 23,351 | 30,725 | 67,595 | 116,755 | 256,861 | 337,975 | 583,775 | 1,284,305 | 6,421,525 |
| -1 | -5 | -11 | -19 | -25 | -55 | -95 | -209 | -275 | -475 | -1,045 | -1,229 | -5,225 | -6,145 | -13,519 | -23,351 | -30,725 | -67,595 | -116,755 | -256,861 | -337,975 | -583,775 | -1,284,305 | -6,421,525 |
Here are some more numbers to try:
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