81681960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:295

約数の個数: 128

約数和(自身を含む): 254016000

約数和(自身を除く): 172334040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 59, 60, 83, 118, 120, 139, 166, 177, 236, 249, 278, 295, 332, 354, 415, 417, 472, 498, 556, 590, 664, 695, 708, 830, 834, 885, 996, 1112, 1180, 1245, 1390, 1416, 1660, 1668, 1770, 1992, 2085, 2360, 2490, 2780, 3320, 3336, 3540, 4170, 4897, 4980, 5560, 7080, 8201, 8340, 9794, 9960, 11537, 14691, 16402, 16680, 19588, 23074, 24485, 24603, 29382, 32804, 34611, 39176, 41005, 46148, 48970, 49206, 57685, 58764, 65608, 69222, 73455, 82010, 92296, 97940, 98412, 115370, 117528, 123015, 138444, 146910, 164020, 173055, 195880, 196824, 230740, 246030, 276888, 293820, 328040, 346110, 461480, 492060, 587640, 680683, 692220, 984120, 1361366, 1384440, 2042049, 2722732, 3403415, 4084098, 5445464, 6806830, 8168196, 10210245, 13613660, 16336392, 20420490, 27227320, 40840980, 81681960]

約数ペア:

[(1, 81681960), (2, 40840980), (3, 27227320), (4, 20420490), (5, 16336392), (6, 13613660), (8, 10210245), (10, 8168196), (12, 6806830), (15, 5445464), (20, 4084098), (24, 3403415), (30, 2722732), (40, 2042049), (59, 1384440), (60, 1361366), (83, 984120), (118, 692220), (120, 680683), (139, 587640), (166, 492060), (177, 461480), (236, 346110), (249, 328040), (278, 293820), (295, 276888), (332, 246030), (354, 230740), (415, 196824), (417, 195880), (472, 173055), (498, 164020), (556, 146910), (590, 138444), (664, 123015), (695, 117528), (708, 115370), (830, 98412), (834, 97940), (885, 92296), (996, 82010), (1112, 73455), (1180, 69222), (1245, 65608), (1390, 58764), (1416, 57685), (1660, 49206), (1668, 48970), (1770, 46148), (1992, 41005), (2085, 39176), (2360, 34611), (2490, 32804), (2780, 29382), (3320, 24603), (3336, 24485), (3540, 23074), (4170, 19588), (4897, 16680), (4980, 16402), (5560, 14691), (7080, 11537), (8201, 9960), (8340, 9794)]