31541880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:245

約数の個数: 128

約数和(自身を含む): 99993600

約数和(自身を除く): 68451720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 31, 40, 60, 61, 62, 93, 120, 122, 124, 139, 155, 183, 186, 244, 248, 278, 305, 310, 366, 372, 417, 465, 488, 556, 610, 620, 695, 732, 744, 834, 915, 930, 1112, 1220, 1240, 1390, 1464, 1668, 1830, 1860, 1891, 2085, 2440, 2780, 3336, 3660, 3720, 3782, 4170, 4309, 5560, 5673, 7320, 7564, 8340, 8479, 8618, 9455, 11346, 12927, 15128, 16680, 16958, 17236, 18910, 21545, 22692, 25437, 25854, 28365, 33916, 34472, 37820, 42395, 43090, 45384, 50874, 51708, 56730, 64635, 67832, 75640, 84790, 86180, 101748, 103416, 113460, 127185, 129270, 169580, 172360, 203496, 226920, 254370, 258540, 262849, 339160, 508740, 517080, 525698, 788547, 1017480, 1051396, 1314245, 1577094, 2102792, 2628490, 3154188, 3942735, 5256980, 6308376, 7885470, 10513960, 15770940, 31541880]

約数ペア:

[(1, 31541880), (2, 15770940), (3, 10513960), (4, 7885470), (5, 6308376), (6, 5256980), (8, 3942735), (10, 3154188), (12, 2628490), (15, 2102792), (20, 1577094), (24, 1314245), (30, 1051396), (31, 1017480), (40, 788547), (60, 525698), (61, 517080), (62, 508740), (93, 339160), (120, 262849), (122, 258540), (124, 254370), (139, 226920), (155, 203496), (183, 172360), (186, 169580), (244, 129270), (248, 127185), (278, 113460), (305, 103416), (310, 101748), (366, 86180), (372, 84790), (417, 75640), (465, 67832), (488, 64635), (556, 56730), (610, 51708), (620, 50874), (695, 45384), (732, 43090), (744, 42395), (834, 37820), (915, 34472), (930, 33916), (1112, 28365), (1220, 25854), (1240, 25437), (1390, 22692), (1464, 21545), (1668, 18910), (1830, 17236), (1860, 16958), (1891, 16680), (2085, 15128), (2440, 12927), (2780, 11346), (3336, 9455), (3660, 8618), (3720, 8479), (3782, 8340), (4170, 7564), (4309, 7320), (5560, 5673)]