209540080

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{181}}^1\times {\mathrm{499}}^1$

素因数の和:722

約数の個数: 80

約数和(自身を含む): 507780000

約数和(自身を除く): 298239920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 181, 232, 290, 362, 464, 499, 580, 724, 905, 998, 1160, 1448, 1810, 1996, 2320, 2495, 2896, 3620, 3992, 4990, 5249, 7240, 7984, 9980, 10498, 14471, 14480, 19960, 20996, 26245, 28942, 39920, 41992, 52490, 57884, 72355, 83984, 90319, 104980, 115768, 144710, 180638, 209960, 231536, 289420, 361276, 419920, 451595, 578840, 722552, 903190, 1157680, 1445104, 1806380, 2619251, 3612760, 5238502, 7225520, 10477004, 13096255, 20954008, 26192510, 41908016, 52385020, 104770040, 209540080]

約数ペア:

[(1, 209540080), (2, 104770040), (4, 52385020), (5, 41908016), (8, 26192510), (10, 20954008), (16, 13096255), (20, 10477004), (29, 7225520), (40, 5238502), (58, 3612760), (80, 2619251), (116, 1806380), (145, 1445104), (181, 1157680), (232, 903190), (290, 722552), (362, 578840), (464, 451595), (499, 419920), (580, 361276), (724, 289420), (905, 231536), (998, 209960), (1160, 180638), (1448, 144710), (1810, 115768), (1996, 104980), (2320, 90319), (2495, 83984), (2896, 72355), (3620, 57884), (3992, 52490), (4990, 41992), (5249, 39920), (7240, 28942), (7984, 26245), (9980, 20996), (10498, 19960), (14471, 14480)]