21011520

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{509}}^1$

素因数の和:572

約数の個数: 112

約数和(自身を含む): 68397120

約数和(自身を除く): 47385600

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 43, 48, 60, 64, 80, 86, 96, 120, 129, 160, 172, 192, 215, 240, 258, 320, 344, 430, 480, 509, 516, 645, 688, 860, 960, 1018, 1032, 1290, 1376, 1527, 1720, 2036, 2064, 2545, 2580, 2752, 3054, 3440, 4072, 4128, 5090, 5160, 6108, 6880, 7635, 8144, 8256, 10180, 10320, 12216, 13760, 15270, 16288, 20360, 20640, 21887, 24432, 30540, 32576, 40720, 41280, 43774, 48864, 61080, 65661, 81440, 87548, 97728, 109435, 122160, 131322, 162880, 175096, 218870, 244320, 262644, 328305, 350192, 437740, 488640, 525288, 656610, 700384, 875480, 1050576, 1313220, 1400768, 1750960, 2101152, 2626440, 3501920, 4202304, 5252880, 7003840, 10505760, 21011520]

約数ペア:

[(1, 21011520), (2, 10505760), (3, 7003840), (4, 5252880), (5, 4202304), (6, 3501920), (8, 2626440), (10, 2101152), (12, 1750960), (15, 1400768), (16, 1313220), (20, 1050576), (24, 875480), (30, 700384), (32, 656610), (40, 525288), (43, 488640), (48, 437740), (60, 350192), (64, 328305), (80, 262644), (86, 244320), (96, 218870), (120, 175096), (129, 162880), (160, 131322), (172, 122160), (192, 109435), (215, 97728), (240, 87548), (258, 81440), (320, 65661), (344, 61080), (430, 48864), (480, 43774), (509, 41280), (516, 40720), (645, 32576), (688, 30540), (860, 24432), (960, 21887), (1018, 20640), (1032, 20360), (1290, 16288), (1376, 15270), (1527, 13760), (1720, 12216), (2036, 10320), (2064, 10180), (2545, 8256), (2580, 8144), (2752, 7635), (3054, 6880), (3440, 6108), (4072, 5160), (4128, 5090)]