A natural number n is called a superperfect number if the sum of the divisors of the sum of its divisors is twice as large as n itself.
The first known superperfect numbers are
2,
4,
16,
64,
4096,
65536,
262144,
1073741824,
1152921504606846976
A natural number n is called a superperfect number if the sum of the divisors of the sum of its divisors is twice as large as n itself.
The first known superperfect numbers are
2,
4,
16,
64,
4096,
65536,
262144,
1073741824,
1152921504606846976
