21189240

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{829}}^1$

素因数の和:917

約数の個数: 96

約数和(自身を含む): 69919200

約数和(自身を除く): 48729960

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 71, 72, 90, 120, 142, 180, 213, 284, 355, 360, 426, 568, 639, 710, 829, 852, 1065, 1278, 1420, 1658, 1704, 2130, 2487, 2556, 2840, 3195, 3316, 4145, 4260, 4974, 5112, 6390, 6632, 7461, 8290, 8520, 9948, 12435, 12780, 14922, 16580, 19896, 24870, 25560, 29844, 33160, 37305, 49740, 58859, 59688, 74610, 99480, 117718, 149220, 176577, 235436, 294295, 298440, 353154, 470872, 529731, 588590, 706308, 882885, 1059462, 1177180, 1412616, 1765770, 2118924, 2354360, 2648655, 3531540, 4237848, 5297310, 7063080, 10594620, 21189240]

約数ペア:

[(1, 21189240), (2, 10594620), (3, 7063080), (4, 5297310), (5, 4237848), (6, 3531540), (8, 2648655), (9, 2354360), (10, 2118924), (12, 1765770), (15, 1412616), (18, 1177180), (20, 1059462), (24, 882885), (30, 706308), (36, 588590), (40, 529731), (45, 470872), (60, 353154), (71, 298440), (72, 294295), (90, 235436), (120, 176577), (142, 149220), (180, 117718), (213, 99480), (284, 74610), (355, 59688), (360, 58859), (426, 49740), (568, 37305), (639, 33160), (710, 29844), (829, 25560), (852, 24870), (1065, 19896), (1278, 16580), (1420, 14922), (1658, 12780), (1704, 12435), (2130, 9948), (2487, 8520), (2556, 8290), (2840, 7461), (3195, 6632), (3316, 6390), (4145, 5112), (4260, 4974)]