81355140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{457}}^1$

素因数の和:538

約数の個数: 144

約数和(自身を含む): 264071808

約数和(自身を除く): 182716668

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 43, 45, 46, 60, 69, 86, 90, 92, 115, 129, 138, 172, 180, 207, 215, 230, 258, 276, 345, 387, 414, 430, 457, 460, 516, 645, 690, 774, 828, 860, 914, 989, 1035, 1290, 1371, 1380, 1548, 1828, 1935, 1978, 2070, 2285, 2580, 2742, 2967, 3870, 3956, 4113, 4140, 4570, 4945, 5484, 5934, 6855, 7740, 8226, 8901, 9140, 9890, 10511, 11868, 13710, 14835, 16452, 17802, 19651, 19780, 20565, 21022, 27420, 29670, 31533, 35604, 39302, 41130, 42044, 44505, 52555, 58953, 59340, 63066, 78604, 82260, 89010, 94599, 98255, 105110, 117906, 126132, 157665, 176859, 178020, 189198, 196510, 210220, 235812, 294765, 315330, 353718, 378396, 393020, 451973, 472995, 589530, 630660, 707436, 884295, 903946, 945990, 1179060, 1355919, 1768590, 1807892, 1891980, 2259865, 2711838, 3537180, 4067757, 4519730, 5423676, 6779595, 8135514, 9039460, 13559190, 16271028, 20338785, 27118380, 40677570, 81355140]

約数ペア:

[(1, 81355140), (2, 40677570), (3, 27118380), (4, 20338785), (5, 16271028), (6, 13559190), (9, 9039460), (10, 8135514), (12, 6779595), (15, 5423676), (18, 4519730), (20, 4067757), (23, 3537180), (30, 2711838), (36, 2259865), (43, 1891980), (45, 1807892), (46, 1768590), (60, 1355919), (69, 1179060), (86, 945990), (90, 903946), (92, 884295), (115, 707436), (129, 630660), (138, 589530), (172, 472995), (180, 451973), (207, 393020), (215, 378396), (230, 353718), (258, 315330), (276, 294765), (345, 235812), (387, 210220), (414, 196510), (430, 189198), (457, 178020), (460, 176859), (516, 157665), (645, 126132), (690, 117906), (774, 105110), (828, 98255), (860, 94599), (914, 89010), (989, 82260), (1035, 78604), (1290, 63066), (1371, 59340), (1380, 58953), (1548, 52555), (1828, 44505), (1935, 42044), (1978, 41130), (2070, 39302), (2285, 35604), (2580, 31533), (2742, 29670), (2967, 27420), (3870, 21022), (3956, 20565), (4113, 19780), (4140, 19651), (4570, 17802), (4945, 16452), (5484, 14835), (5934, 13710), (6855, 11868), (7740, 10511), (8226, 9890), (8901, 9140)]