2379ab + 23ab79 + 7923ab + 79ab23 + ab7923 + ab2379 = 2989896
=> 237900 + ab + 230079 + 100 . ab + 792300 + ab + 790023 + 100 . ab + 10000 . ab + 7923 + 10000 . ab + 2379 =989896
=> 20202 . ab + 2060604 = 2989896
=> 20202 . ab = 2989896 - 2060604 = 929292
=> ab = 929292 : 20202 = 46