A063977 Numbers which are sums of unitary divisors, the usigma values: their inverse usigma set is not empty; usigma[]=A034448().

1, 3, 4, 5, 6, 8, 9, 10, 12, 14, 17, 18, 20, 24, 26, 28, 30, 32, 33, 36, 38, 40, 42, 44, 48, 50, 54, 56, 60, 62, 65, 68, 70, 72, 74, 78, 80, 82, 84, 90, 96, 98, 100, 102, 104, 108, 110, 112, 114, 120, 122, 126, 128, 129, 130, 132, 136, 138, 140, 144, 150, 152, 158