21240180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{313}}^1$

素因数の和:370

約数の個数: 144

約数和(自身を含む): 72006480

約数和(自身を除く): 50766300

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 29, 30, 36, 39, 45, 52, 58, 60, 65, 78, 87, 90, 116, 117, 130, 145, 156, 174, 180, 195, 234, 260, 261, 290, 313, 348, 377, 390, 435, 468, 522, 580, 585, 626, 754, 780, 870, 939, 1044, 1131, 1170, 1252, 1305, 1508, 1565, 1740, 1878, 1885, 2262, 2340, 2610, 2817, 3130, 3393, 3756, 3770, 4069, 4524, 4695, 5220, 5634, 5655, 6260, 6786, 7540, 8138, 9077, 9390, 11268, 11310, 12207, 13572, 14085, 16276, 16965, 18154, 18780, 20345, 22620, 24414, 27231, 28170, 33930, 36308, 36621, 40690, 45385, 48828, 54462, 56340, 61035, 67860, 73242, 81380, 81693, 90770, 108924, 118001, 122070, 136155, 146484, 163386, 181540, 183105, 236002, 244140, 272310, 326772, 354003, 366210, 408465, 472004, 544620, 590005, 708006, 732420, 816930, 1062009, 1180010, 1416012, 1633860, 1770015, 2124018, 2360020, 3540030, 4248036, 5310045, 7080060, 10620090, 21240180]

約数ペア:

[(1, 21240180), (2, 10620090), (3, 7080060), (4, 5310045), (5, 4248036), (6, 3540030), (9, 2360020), (10, 2124018), (12, 1770015), (13, 1633860), (15, 1416012), (18, 1180010), (20, 1062009), (26, 816930), (29, 732420), (30, 708006), (36, 590005), (39, 544620), (45, 472004), (52, 408465), (58, 366210), (60, 354003), (65, 326772), (78, 272310), (87, 244140), (90, 236002), (116, 183105), (117, 181540), (130, 163386), (145, 146484), (156, 136155), (174, 122070), (180, 118001), (195, 108924), (234, 90770), (260, 81693), (261, 81380), (290, 73242), (313, 67860), (348, 61035), (377, 56340), (390, 54462), (435, 48828), (468, 45385), (522, 40690), (580, 36621), (585, 36308), (626, 33930), (754, 28170), (780, 27231), (870, 24414), (939, 22620), (1044, 20345), (1131, 18780), (1170, 18154), (1252, 16965), (1305, 16276), (1508, 14085), (1565, 13572), (1740, 12207), (1878, 11310), (1885, 11268), (2262, 9390), (2340, 9077), (2610, 8138), (2817, 7540), (3130, 6786), (3393, 6260), (3756, 5655), (3770, 5634), (4069, 5220), (4524, 4695)]