81661905

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:156

約数の個数: 128

約数和(自身を含む): 172032000

約数和(自身を除く): 90370095

約数列:

[1, 3, 5, 9, 13, 15, 19, 27, 31, 39, 45, 57, 65, 79, 93, 95, 117, 135, 155, 171, 195, 237, 247, 279, 285, 351, 395, 403, 465, 513, 585, 589, 711, 741, 837, 855, 1027, 1185, 1209, 1235, 1395, 1501, 1755, 1767, 2015, 2133, 2223, 2449, 2565, 2945, 3081, 3555, 3627, 3705, 4185, 4503, 5135, 5301, 6045, 6669, 7347, 7505, 7657, 8835, 9243, 10665, 10881, 11115, 12245, 13509, 15405, 15903, 18135, 19513, 22041, 22515, 22971, 26505, 27729, 31837, 33345, 36735, 38285, 40527, 46215, 46531, 54405, 58539, 66123, 67545, 68913, 79515, 95511, 97565, 110205, 114855, 138645, 139593, 159185, 175617, 202635, 206739, 232655, 286533, 292695, 330615, 344565, 418779, 477555, 526851, 604903, 697965, 859599, 878085, 1033695, 1256337, 1432665, 1814709, 2093895, 2634255, 3024515, 4297995, 5444127, 6281685, 9073545, 16332381, 27220635, 81661905]

約数ペア:

[(1, 81661905), (3, 27220635), (5, 16332381), (9, 9073545), (13, 6281685), (15, 5444127), (19, 4297995), (27, 3024515), (31, 2634255), (39, 2093895), (45, 1814709), (57, 1432665), (65, 1256337), (79, 1033695), (93, 878085), (95, 859599), (117, 697965), (135, 604903), (155, 526851), (171, 477555), (195, 418779), (237, 344565), (247, 330615), (279, 292695), (285, 286533), (351, 232655), (395, 206739), (403, 202635), (465, 175617), (513, 159185), (585, 139593), (589, 138645), (711, 114855), (741, 110205), (837, 97565), (855, 95511), (1027, 79515), (1185, 68913), (1209, 67545), (1235, 66123), (1395, 58539), (1501, 54405), (1755, 46531), (1767, 46215), (2015, 40527), (2133, 38285), (2223, 36735), (2449, 33345), (2565, 31837), (2945, 27729), (3081, 26505), (3555, 22971), (3627, 22515), (3705, 22041), (4185, 19513), (4503, 18135), (5135, 15903), (5301, 15405), (6045, 13509), (6669, 12245), (7347, 11115), (7505, 10881), (7657, 10665), (8835, 9243)]