81905460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2143}}^1$

素因数の和:2182

約数の個数: 144

約数和(自身を含む): 287433216

約数和(自身を除く): 205527756

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 49, 52, 60, 65, 70, 78, 84, 91, 98, 105, 130, 140, 147, 156, 182, 195, 196, 210, 245, 260, 273, 294, 364, 390, 420, 455, 490, 546, 588, 637, 735, 780, 910, 980, 1092, 1274, 1365, 1470, 1820, 1911, 2143, 2548, 2730, 2940, 3185, 3822, 4286, 5460, 6370, 6429, 7644, 8572, 9555, 10715, 12740, 12858, 15001, 19110, 21430, 25716, 27859, 30002, 32145, 38220, 42860, 45003, 55718, 60004, 64290, 75005, 83577, 90006, 105007, 111436, 128580, 139295, 150010, 167154, 180012, 195013, 210014, 225015, 278590, 300020, 315021, 334308, 390026, 417885, 420028, 450030, 525035, 557180, 585039, 630042, 780052, 835770, 900060, 975065, 1050070, 1170078, 1260084, 1365091, 1575105, 1671540, 1950130, 2100140, 2340156, 2730182, 2925195, 3150210, 3900260, 4095273, 5460364, 5850390, 6300420, 6825455, 8190546, 11700780, 13650910, 16381092, 20476365, 27301820, 40952730, 81905460]

約数ペア:

[(1, 81905460), (2, 40952730), (3, 27301820), (4, 20476365), (5, 16381092), (6, 13650910), (7, 11700780), (10, 8190546), (12, 6825455), (13, 6300420), (14, 5850390), (15, 5460364), (20, 4095273), (21, 3900260), (26, 3150210), (28, 2925195), (30, 2730182), (35, 2340156), (39, 2100140), (42, 1950130), (49, 1671540), (52, 1575105), (60, 1365091), (65, 1260084), (70, 1170078), (78, 1050070), (84, 975065), (91, 900060), (98, 835770), (105, 780052), (130, 630042), (140, 585039), (147, 557180), (156, 525035), (182, 450030), (195, 420028), (196, 417885), (210, 390026), (245, 334308), (260, 315021), (273, 300020), (294, 278590), (364, 225015), (390, 210014), (420, 195013), (455, 180012), (490, 167154), (546, 150010), (588, 139295), (637, 128580), (735, 111436), (780, 105007), (910, 90006), (980, 83577), (1092, 75005), (1274, 64290), (1365, 60004), (1470, 55718), (1820, 45003), (1911, 42860), (2143, 38220), (2548, 32145), (2730, 30002), (2940, 27859), (3185, 25716), (3822, 21430), (4286, 19110), (5460, 15001), (6370, 12858), (6429, 12740), (7644, 10715), (8572, 9555)]