81109809

素因数分解:

$3^3\times {\mathrm{11}}^3\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:140

約数の個数: 64

約数和(自身を含む): 137967360

約数和(自身を除く): 56857551

約数列:

[1, 3, 9, 11, 27, 33, 37, 61, 99, 111, 121, 183, 297, 333, 363, 407, 549, 671, 999, 1089, 1221, 1331, 1647, 2013, 2257, 3267, 3663, 3993, 4477, 6039, 6771, 7381, 10989, 11979, 13431, 18117, 20313, 22143, 24827, 35937, 40293, 49247, 60939, 66429, 74481, 81191, 120879, 147741, 199287, 223443, 243573, 273097, 443223, 670329, 730719, 819291, 1329669, 2192157, 2457873, 3004067, 7373619, 9012201, 27036603, 81109809]

約数ペア:

[(1, 81109809), (3, 27036603), (9, 9012201), (11, 7373619), (27, 3004067), (33, 2457873), (37, 2192157), (61, 1329669), (99, 819291), (111, 730719), (121, 670329), (183, 443223), (297, 273097), (333, 243573), (363, 223443), (407, 199287), (549, 147741), (671, 120879), (999, 81191), (1089, 74481), (1221, 66429), (1331, 60939), (1647, 49247), (2013, 40293), (2257, 35937), (3267, 24827), (3663, 22143), (3993, 20313), (4477, 18117), (6039, 13431), (6771, 11979), (7381, 10989)]