81351540

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{881}}^1$

素因数の和:924

約数の個数: 144

約数和(自身を含む): 269680320

約数和(自身を除く): 188328780

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, 881, 972, 1026, 1140, 1215, 1539, 1620, 1710, 1762, 2052, 2430, 2565, 2643, 3078, 3420, 3524, 4405, 4617, 4860, 5130, 5286, 6156, 7695, 7929, 8810, 9234, 10260, 10572, 13215, 15390, 15858, 16739, 17620, 18468, 23085, 23787, 26430, 30780, 31716, 33478, 39645, 46170, 47574, 50217, 52860, 66956, 71361, 79290, 83695, 92340, 95148, 100434, 118935, 142722, 150651, 158580, 167390, 200868, 214083, 237870, 251085, 285444, 301302, 334780, 356805, 428166, 451953, 475740, 502170, 602604, 713610, 753255, 856332, 903906, 1004340, 1070415, 1355859, 1427220, 1506510, 1807812, 2140830, 2259765, 2711718, 3013020, 4067577, 4281660, 4519530, 5423436, 6779295, 8135154, 9039060, 13558590, 16270308, 20337885, 27117180, 40675770, 81351540]

約数ペア:

[(1, 81351540), (2, 40675770), (3, 27117180), (4, 20337885), (5, 16270308), (6, 13558590), (9, 9039060), (10, 8135154), (12, 6779295), (15, 5423436), (18, 4519530), (19, 4281660), (20, 4067577), (27, 3013020), (30, 2711718), (36, 2259765), (38, 2140830), (45, 1807812), (54, 1506510), (57, 1427220), (60, 1355859), (76, 1070415), (81, 1004340), (90, 903906), (95, 856332), (108, 753255), (114, 713610), (135, 602604), (162, 502170), (171, 475740), (180, 451953), (190, 428166), (228, 356805), (243, 334780), (270, 301302), (285, 285444), (324, 251085), (342, 237870), (380, 214083), (405, 200868), (486, 167390), (513, 158580), (540, 150651), (570, 142722), (684, 118935), (810, 100434), (855, 95148), (881, 92340), (972, 83695), (1026, 79290), (1140, 71361), (1215, 66956), (1539, 52860), (1620, 50217), (1710, 47574), (1762, 46170), (2052, 39645), (2430, 33478), (2565, 31716), (2643, 30780), (3078, 26430), (3420, 23787), (3524, 23085), (4405, 18468), (4617, 17620), (4860, 16739), (5130, 15858), (5286, 15390), (6156, 13215), (7695, 10572), (7929, 10260), (8810, 9234)]