21615240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:187

約数の個数: 128

約数和(自身を含む): 68428800

約数和(自身を除く): 46813560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 43, 59, 60, 71, 86, 118, 120, 129, 142, 172, 177, 213, 215, 236, 258, 284, 295, 344, 354, 355, 426, 430, 472, 516, 568, 590, 645, 708, 710, 852, 860, 885, 1032, 1065, 1180, 1290, 1416, 1420, 1704, 1720, 1770, 2130, 2360, 2537, 2580, 2840, 3053, 3540, 4189, 4260, 5074, 5160, 6106, 7080, 7611, 8378, 8520, 9159, 10148, 12212, 12567, 12685, 15222, 15265, 16756, 18318, 20296, 20945, 24424, 25134, 25370, 30444, 30530, 33512, 36636, 38055, 41890, 45795, 50268, 50740, 60888, 61060, 62835, 73272, 76110, 83780, 91590, 100536, 101480, 122120, 125670, 152220, 167560, 180127, 183180, 251340, 304440, 360254, 366360, 502680, 540381, 720508, 900635, 1080762, 1441016, 1801270, 2161524, 2701905, 3602540, 4323048, 5403810, 7205080, 10807620, 21615240]

約数ペア:

[(1, 21615240), (2, 10807620), (3, 7205080), (4, 5403810), (5, 4323048), (6, 3602540), (8, 2701905), (10, 2161524), (12, 1801270), (15, 1441016), (20, 1080762), (24, 900635), (30, 720508), (40, 540381), (43, 502680), (59, 366360), (60, 360254), (71, 304440), (86, 251340), (118, 183180), (120, 180127), (129, 167560), (142, 152220), (172, 125670), (177, 122120), (213, 101480), (215, 100536), (236, 91590), (258, 83780), (284, 76110), (295, 73272), (344, 62835), (354, 61060), (355, 60888), (426, 50740), (430, 50268), (472, 45795), (516, 41890), (568, 38055), (590, 36636), (645, 33512), (708, 30530), (710, 30444), (852, 25370), (860, 25134), (885, 24424), (1032, 20945), (1065, 20296), (1180, 18318), (1290, 16756), (1416, 15265), (1420, 15222), (1704, 12685), (1720, 12567), (1770, 12212), (2130, 10148), (2360, 9159), (2537, 8520), (2580, 8378), (2840, 7611), (3053, 7080), (3540, 6106), (4189, 5160), (4260, 5074)]