81905580

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{887}}^1$

素因数の和:930

約数の個数: 144

約数和(自身を含む): 271514880

約数和(自身を除く): 189609300

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 27, 30, 36, 38, 45, 54, 57, 60, 76, 81, 90, 95, 108, 114, 135, 162, 171, 180, 190, 228, 243, 270, 285, 324, 342, 380, 405, 486, 513, 540, 570, 684, 810, 855, 887, 972, 1026, 1140, 1215, 1539, 1620, 1710, 1774, 2052, 2430, 2565, 2661, 3078, 3420, 3548, 4435, 4617, 4860, 5130, 5322, 6156, 7695, 7983, 8870, 9234, 10260, 10644, 13305, 15390, 15966, 16853, 17740, 18468, 23085, 23949, 26610, 30780, 31932, 33706, 39915, 46170, 47898, 50559, 53220, 67412, 71847, 79830, 84265, 92340, 95796, 101118, 119745, 143694, 151677, 159660, 168530, 202236, 215541, 239490, 252795, 287388, 303354, 337060, 359235, 431082, 455031, 478980, 505590, 606708, 718470, 758385, 862164, 910062, 1011180, 1077705, 1365093, 1436940, 1516770, 1820124, 2155410, 2275155, 2730186, 3033540, 4095279, 4310820, 4550310, 5460372, 6825465, 8190558, 9100620, 13650930, 16381116, 20476395, 27301860, 40952790, 81905580]

約数ペア:

[(1, 81905580), (2, 40952790), (3, 27301860), (4, 20476395), (5, 16381116), (6, 13650930), (9, 9100620), (10, 8190558), (12, 6825465), (15, 5460372), (18, 4550310), (19, 4310820), (20, 4095279), (27, 3033540), (30, 2730186), (36, 2275155), (38, 2155410), (45, 1820124), (54, 1516770), (57, 1436940), (60, 1365093), (76, 1077705), (81, 1011180), (90, 910062), (95, 862164), (108, 758385), (114, 718470), (135, 606708), (162, 505590), (171, 478980), (180, 455031), (190, 431082), (228, 359235), (243, 337060), (270, 303354), (285, 287388), (324, 252795), (342, 239490), (380, 215541), (405, 202236), (486, 168530), (513, 159660), (540, 151677), (570, 143694), (684, 119745), (810, 101118), (855, 95796), (887, 92340), (972, 84265), (1026, 79830), (1140, 71847), (1215, 67412), (1539, 53220), (1620, 50559), (1710, 47898), (1774, 46170), (2052, 39915), (2430, 33706), (2565, 31932), (2661, 30780), (3078, 26610), (3420, 23949), (3548, 23085), (4435, 18468), (4617, 17740), (4860, 16853), (5130, 15966), (5322, 15390), (6156, 13305), (7695, 10644), (7983, 10260), (8870, 9234)]