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Reference9 articles.
1. Artuhov, M.M.: On the problem of odd
$$h$$
h
-fold perfect numbers. Acta Arith. 23, 249–255 (1973)
2. Broughan, K.A., Zhou, Q.: Odd multiperfect numbers of abundancy
$$4$$
4
. J. Number Theory 128, 1566–1575 (2008)
3. Carmichael, R.D.: Multiply perfect numbers of four different primes. Ann. Math. 8, 149–158 (1907)
4. Cohen, G.L., Hagis Jr., P.: Results concerning odd multiperfect numbers. Bull. Malays. Math. Soc. 8, 23–26 (1985)
5. Hagis Jr., P.: The third largest prime factor of an odd multiperfect number exceeds 100. Bull. Malays. Math. Soc. 9, 43–49 (1986)