Answer :
According to Ramanujan some numbers can be represent as are the sum of 2 cubes of positive integers .
So,
1729 = 13 + 123 = 93 + 103
Some other numbers :
23 + 163 = 93 + 153 = 4104 ,
23 + 243 = 183 + 203 = 13832
And
103 + 273 = 193 + 243 = 20683