1640521520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^2\times {\mathrm{1109}}^1$

素因数の和:1215

約数の個数: 120

約数和(自身を含む): 4268766960

約数和(自身を除く): 2628245440

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 41, 44, 55, 80, 82, 88, 110, 164, 176, 205, 220, 328, 410, 440, 451, 656, 820, 880, 902, 1109, 1640, 1681, 1804, 2218, 2255, 3280, 3362, 3608, 4436, 4510, 5545, 6724, 7216, 8405, 8872, 9020, 11090, 12199, 13448, 16810, 17744, 18040, 18491, 22180, 24398, 26896, 33620, 36080, 36982, 44360, 45469, 48796, 60995, 67240, 73964, 88720, 90938, 92455, 97592, 121990, 134480, 147928, 181876, 184910, 195184, 227345, 243980, 295856, 363752, 369820, 454690, 487960, 500159, 727504, 739640, 909380, 975920, 1000318, 1479280, 1818760, 1864229, 2000636, 2500795, 3637520, 3728458, 4001272, 5001590, 7456916, 8002544, 9321145, 10003180, 14913832, 18642290, 20006360, 20506519, 29827664, 37284580, 40012720, 41013038, 74569160, 82026076, 102532595, 149138320, 164052152, 205065190, 328104304, 410130380, 820260760, 1640521520]

約数ペア:

[(1, 1640521520), (2, 820260760), (4, 410130380), (5, 328104304), (8, 205065190), (10, 164052152), (11, 149138320), (16, 102532595), (20, 82026076), (22, 74569160), (40, 41013038), (41, 40012720), (44, 37284580), (55, 29827664), (80, 20506519), (82, 20006360), (88, 18642290), (110, 14913832), (164, 10003180), (176, 9321145), (205, 8002544), (220, 7456916), (328, 5001590), (410, 4001272), (440, 3728458), (451, 3637520), (656, 2500795), (820, 2000636), (880, 1864229), (902, 1818760), (1109, 1479280), (1640, 1000318), (1681, 975920), (1804, 909380), (2218, 739640), (2255, 727504), (3280, 500159), (3362, 487960), (3608, 454690), (4436, 369820), (4510, 363752), (5545, 295856), (6724, 243980), (7216, 227345), (8405, 195184), (8872, 184910), (9020, 181876), (11090, 147928), (12199, 134480), (13448, 121990), (16810, 97592), (17744, 92455), (18040, 90938), (18491, 88720), (22180, 73964), (24398, 67240), (26896, 60995), (33620, 48796), (36080, 45469), (36982, 44360)]