28778640

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{991}}^1$

素因数の和:1029

約数の個数: 120

約数和(自身を含む): 98160384

約数和(自身を除く): 69381744

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 33, 40, 44, 48, 55, 60, 66, 80, 88, 110, 120, 121, 132, 165, 176, 220, 240, 242, 264, 330, 363, 440, 484, 528, 605, 660, 726, 880, 968, 991, 1210, 1320, 1452, 1815, 1936, 1982, 2420, 2640, 2904, 2973, 3630, 3964, 4840, 4955, 5808, 5946, 7260, 7928, 9680, 9910, 10901, 11892, 14520, 14865, 15856, 19820, 21802, 23784, 29040, 29730, 32703, 39640, 43604, 47568, 54505, 59460, 65406, 79280, 87208, 109010, 118920, 119911, 130812, 163515, 174416, 218020, 237840, 239822, 261624, 327030, 359733, 436040, 479644, 523248, 599555, 654060, 719466, 872080, 959288, 1199110, 1308120, 1438932, 1798665, 1918576, 2398220, 2616240, 2877864, 3597330, 4796440, 5755728, 7194660, 9592880, 14389320, 28778640]

約数ペア:

[(1, 28778640), (2, 14389320), (3, 9592880), (4, 7194660), (5, 5755728), (6, 4796440), (8, 3597330), (10, 2877864), (11, 2616240), (12, 2398220), (15, 1918576), (16, 1798665), (20, 1438932), (22, 1308120), (24, 1199110), (30, 959288), (33, 872080), (40, 719466), (44, 654060), (48, 599555), (55, 523248), (60, 479644), (66, 436040), (80, 359733), (88, 327030), (110, 261624), (120, 239822), (121, 237840), (132, 218020), (165, 174416), (176, 163515), (220, 130812), (240, 119911), (242, 118920), (264, 109010), (330, 87208), (363, 79280), (440, 65406), (484, 59460), (528, 54505), (605, 47568), (660, 43604), (726, 39640), (880, 32703), (968, 29730), (991, 29040), (1210, 23784), (1320, 21802), (1452, 19820), (1815, 15856), (1936, 14865), (1982, 14520), (2420, 11892), (2640, 10901), (2904, 9910), (2973, 9680), (3630, 7928), (3964, 7260), (4840, 5946), (4955, 5808)]