640851120

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{9781}}^1$

素因数の和:9820

約数の個数: 240

約数和(自身を含む): 2649122112

約数和(自身を除く): 2008270992

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 18, 20, 21, 24, 26, 28, 30, 35, 36, 39, 40, 42, 45, 48, 52, 56, 60, 63, 65, 70, 72, 78, 80, 84, 90, 91, 104, 105, 112, 117, 120, 126, 130, 140, 144, 156, 168, 180, 182, 195, 208, 210, 234, 240, 252, 260, 273, 280, 312, 315, 336, 360, 364, 390, 420, 455, 468, 504, 520, 546, 560, 585, 624, 630, 720, 728, 780, 819, 840, 910, 936, 1008, 1040, 1092, 1170, 1260, 1365, 1456, 1560, 1638, 1680, 1820, 1872, 2184, 2340, 2520, 2730, 3120, 3276, 3640, 4095, 4368, 4680, 5040, 5460, 6552, 7280, 8190, 9360, 9781, 10920, 13104, 16380, 19562, 21840, 29343, 32760, 39124, 48905, 58686, 65520, 68467, 78248, 88029, 97810, 117372, 127153, 136934, 146715, 156496, 176058, 195620, 205401, 234744, 254306, 273868, 293430, 342335, 352116, 381459, 391240, 410802, 440145, 469488, 508612, 547736, 586860, 616203, 635765, 684670, 704232, 762918, 782480, 821604, 880290, 890071, 1017224, 1027005, 1095472, 1144377, 1173720, 1232406, 1271530, 1369340, 1408464, 1525836, 1643208, 1760580, 1780142, 1907295, 2034448, 2054010, 2288754, 2347440, 2464812, 2543060, 2670213, 2738680, 3051672, 3081015, 3286416, 3521160, 3560284, 3814590, 4108020, 4450355, 4577508, 4929624, 5086120, 5340426, 5477360, 5721885, 6103344, 6162030, 7042320, 7120568, 7629180, 8010639, 8216040, 8900710, 9155016, 9859248, 10172240, 10680852, 11443770, 12324060, 13351065, 14241136, 15258360, 16021278, 16432080, 17801420, 18310032, 21361704, 22887540, 24648120, 26702130, 30516720, 32042556, 35602840, 40053195, 42723408, 45775080, 49296240, 53404260, 64085112, 71205680, 80106390, 91550160, 106808520, 128170224, 160212780, 213617040, 320425560, 640851120]

約数ペア:

[(1, 640851120), (2, 320425560), (3, 213617040), (4, 160212780), (5, 128170224), (6, 106808520), (7, 91550160), (8, 80106390), (9, 71205680), (10, 64085112), (12, 53404260), (13, 49296240), (14, 45775080), (15, 42723408), (16, 40053195), (18, 35602840), (20, 32042556), (21, 30516720), (24, 26702130), (26, 24648120), (28, 22887540), (30, 21361704), (35, 18310032), (36, 17801420), (39, 16432080), (40, 16021278), (42, 15258360), (45, 14241136), (48, 13351065), (52, 12324060), (56, 11443770), (60, 10680852), (63, 10172240), (65, 9859248), (70, 9155016), (72, 8900710), (78, 8216040), (80, 8010639), (84, 7629180), (90, 7120568), (91, 7042320), (104, 6162030), (105, 6103344), (112, 5721885), (117, 5477360), (120, 5340426), (126, 5086120), (130, 4929624), (140, 4577508), (144, 4450355), (156, 4108020), (168, 3814590), (180, 3560284), (182, 3521160), (195, 3286416), (208, 3081015), (210, 3051672), (234, 2738680), (240, 2670213), (252, 2543060), (260, 2464812), (273, 2347440), (280, 2288754), (312, 2054010), (315, 2034448), (336, 1907295), (360, 1780142), (364, 1760580), (390, 1643208), (420, 1525836), (455, 1408464), (468, 1369340), (504, 1271530), (520, 1232406), (546, 1173720), (560, 1144377), (585, 1095472), (624, 1027005), (630, 1017224), (720, 890071), (728, 880290), (780, 821604), (819, 782480), (840, 762918), (910, 704232), (936, 684670), (1008, 635765), (1040, 616203), (1092, 586860), (1170, 547736), (1260, 508612), (1365, 469488), (1456, 440145), (1560, 410802), (1638, 391240), (1680, 381459), (1820, 352116), (1872, 342335), (2184, 293430), (2340, 273868), (2520, 254306), (2730, 234744), (3120, 205401), (3276, 195620), (3640, 176058), (4095, 156496), (4368, 146715), (4680, 136934), (5040, 127153), (5460, 117372), (6552, 97810), (7280, 88029), (8190, 78248), (9360, 68467), (9781, 65520), (10920, 58686), (13104, 48905), (16380, 39124), (19562, 32760), (21840, 29343)]