20929920

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{991}}^1$

素因数の和:1024

約数の個数: 128

約数和(自身を含む): 72852480

約数和(自身を除く): 51922560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 32, 33, 40, 44, 48, 55, 60, 64, 66, 80, 88, 96, 110, 120, 128, 132, 160, 165, 176, 192, 220, 240, 264, 320, 330, 352, 384, 440, 480, 528, 640, 660, 704, 880, 960, 991, 1056, 1320, 1408, 1760, 1920, 1982, 2112, 2640, 2973, 3520, 3964, 4224, 4955, 5280, 5946, 7040, 7928, 9910, 10560, 10901, 11892, 14865, 15856, 19820, 21120, 21802, 23784, 29730, 31712, 32703, 39640, 43604, 47568, 54505, 59460, 63424, 65406, 79280, 87208, 95136, 109010, 118920, 126848, 130812, 158560, 163515, 174416, 190272, 218020, 237840, 261624, 317120, 327030, 348832, 380544, 436040, 475680, 523248, 634240, 654060, 697664, 872080, 951360, 1046496, 1308120, 1395328, 1744160, 1902720, 2092992, 2616240, 3488320, 4185984, 5232480, 6976640, 10464960, 20929920]

約数ペア:

[(1, 20929920), (2, 10464960), (3, 6976640), (4, 5232480), (5, 4185984), (6, 3488320), (8, 2616240), (10, 2092992), (11, 1902720), (12, 1744160), (15, 1395328), (16, 1308120), (20, 1046496), (22, 951360), (24, 872080), (30, 697664), (32, 654060), (33, 634240), (40, 523248), (44, 475680), (48, 436040), (55, 380544), (60, 348832), (64, 327030), (66, 317120), (80, 261624), (88, 237840), (96, 218020), (110, 190272), (120, 174416), (128, 163515), (132, 158560), (160, 130812), (165, 126848), (176, 118920), (192, 109010), (220, 95136), (240, 87208), (264, 79280), (320, 65406), (330, 63424), (352, 59460), (384, 54505), (440, 47568), (480, 43604), (528, 39640), (640, 32703), (660, 31712), (704, 29730), (880, 23784), (960, 21802), (991, 21120), (1056, 19820), (1320, 15856), (1408, 14865), (1760, 11892), (1920, 10901), (1982, 10560), (2112, 9910), (2640, 7928), (2973, 7040), (3520, 5946), (3964, 5280), (4224, 4955)]