Numbers like 1729, 4104, 13832, are known as Hardy – Ramanujan Numbers. They can be expressed as sum of two cubes in two different ways. … If in the prime factorisation of any number each factor appears three times, then the number is a perfect cube.

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Step-by-step explanation:Numbers like 1729, 4104, 13832, are known as Hardy – Ramanujan Numbers. They can be expressed as sum of two cubes in two different ways. … If in the prime factorisation of any number each factor appears three times, then the number is a perfect cube.

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Answer:then it is called prime triplet