  1000  10                 1000                                                       

    10    110  10          1.2.4.8.16.32.64.128.256.489      1000        1+2+4+8+16+32+64+128+256+489=1000  

  1   1             4    1 2      2    2     3   1 2          8     13           6   2 3     2+4=6  7   1.2.3     1+2+4=7       512  110              

                         1.2.4.8.16.32            1=1.2=2.3=1+2.4=4.5=1+4.6=2+4.7=1+2+4.8=8.10=2+8.11=1+2+8                                2           8 16 64 128.128 256   

10   489    9    2556                   1000     10      489     512            10    512         10023  

1000   1023               9     245   10    500                        1023           