20739840

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{491}}^1$

素因数の和:526

約数の個数: 144

約数和(自身を含む): 72406656

約数和(自身を除く): 51666816

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, 256, 264, 320, 330, 352, 384, 440, 480, 491, 528, 640, 660, 704, 768, 880, 960, 982, 1056, 1280, 1320, 1408, 1473, 1760, 1920, 1964, 2112, 2455, 2640, 2816, 2946, 3520, 3840, 3928, 4224, 4910, 5280, 5401, 5892, 7040, 7365, 7856, 8448, 9820, 10560, 10802, 11784, 14080, 14730, 15712, 16203, 19640, 21120, 21604, 23568, 27005, 29460, 31424, 32406, 39280, 42240, 43208, 47136, 54010, 58920, 62848, 64812, 78560, 81015, 86416, 94272, 108020, 117840, 125696, 129624, 157120, 162030, 172832, 188544, 216040, 235680, 259248, 314240, 324060, 345664, 377088, 432080, 471360, 518496, 628480, 648120, 691328, 864160, 942720, 1036992, 1296240, 1382656, 1728320, 1885440, 2073984, 2592480, 3456640, 4147968, 5184960, 6913280, 10369920, 20739840]

約数ペア:

[(1, 20739840), (2, 10369920), (3, 6913280), (4, 5184960), (5, 4147968), (6, 3456640), (8, 2592480), (10, 2073984), (11, 1885440), (12, 1728320), (15, 1382656), (16, 1296240), (20, 1036992), (22, 942720), (24, 864160), (30, 691328), (32, 648120), (33, 628480), (40, 518496), (44, 471360), (48, 432080), (55, 377088), (60, 345664), (64, 324060), (66, 314240), (80, 259248), (88, 235680), (96, 216040), (110, 188544), (120, 172832), (128, 162030), (132, 157120), (160, 129624), (165, 125696), (176, 117840), (192, 108020), (220, 94272), (240, 86416), (256, 81015), (264, 78560), (320, 64812), (330, 62848), (352, 58920), (384, 54010), (440, 47136), (480, 43208), (491, 42240), (528, 39280), (640, 32406), (660, 31424), (704, 29460), (768, 27005), (880, 23568), (960, 21604), (982, 21120), (1056, 19640), (1280, 16203), (1320, 15712), (1408, 14730), (1473, 14080), (1760, 11784), (1920, 10802), (1964, 10560), (2112, 9820), (2455, 8448), (2640, 7856), (2816, 7365), (2946, 7040), (3520, 5892), (3840, 5401), (3928, 5280), (4224, 4910)]