20781678735

素因数分解:

$3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{13709}}^1$

素因数の和:13942

約数の個数: 80

約数和(自身を含む): 39415701600

約数和(自身を除く): 18634022865

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 81, 95, 135, 171, 197, 285, 405, 513, 591, 855, 985, 1539, 1773, 2565, 2955, 3743, 5319, 7695, 8865, 11229, 13709, 15957, 18715, 26595, 33687, 41127, 56145, 68545, 79785, 101061, 123381, 168435, 205635, 260471, 303183, 370143, 505305, 616905, 781413, 1110429, 1302355, 1515915, 1850715, 2344239, 2700673, 3907065, 5552145, 7032717, 8102019, 11721195, 13503365, 21098151, 24306057, 35163585, 40510095, 51312787, 72918171, 105490755, 121530285, 153938361, 218754513, 256563935, 364590855, 461815083, 769691805, 1093772565, 1385445249, 2309075415, 4156335747, 6927226245, 20781678735]

約数ペア:

[(1, 20781678735), (3, 6927226245), (5, 4156335747), (9, 2309075415), (15, 1385445249), (19, 1093772565), (27, 769691805), (45, 461815083), (57, 364590855), (81, 256563935), (95, 218754513), (135, 153938361), (171, 121530285), (197, 105490755), (285, 72918171), (405, 51312787), (513, 40510095), (591, 35163585), (855, 24306057), (985, 21098151), (1539, 13503365), (1773, 11721195), (2565, 8102019), (2955, 7032717), (3743, 5552145), (5319, 3907065), (7695, 2700673), (8865, 2344239), (11229, 1850715), (13709, 1515915), (15957, 1302355), (18715, 1110429), (26595, 781413), (33687, 616905), (41127, 505305), (56145, 370143), (68545, 303183), (79785, 260471), (101061, 205635), (123381, 168435)]