19712308

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{223}}^1$

素因数の和:293

約数の個数: 72

約数和(自身を含む): 45045504

約数和(自身を除く): 25333196

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 41, 44, 49, 77, 82, 98, 154, 164, 196, 223, 287, 308, 446, 451, 539, 574, 892, 902, 1078, 1148, 1561, 1804, 2009, 2156, 2453, 3122, 3157, 4018, 4906, 6244, 6314, 8036, 9143, 9812, 10927, 12628, 17171, 18286, 21854, 22099, 34342, 36572, 43708, 44198, 64001, 68684, 88396, 100573, 120197, 128002, 201146, 240394, 256004, 402292, 448007, 480788, 704011, 896014, 1408022, 1792028, 2816044, 4928077, 9856154, 19712308]

約数ペア:

[(1, 19712308), (2, 9856154), (4, 4928077), (7, 2816044), (11, 1792028), (14, 1408022), (22, 896014), (28, 704011), (41, 480788), (44, 448007), (49, 402292), (77, 256004), (82, 240394), (98, 201146), (154, 128002), (164, 120197), (196, 100573), (223, 88396), (287, 68684), (308, 64001), (446, 44198), (451, 43708), (539, 36572), (574, 34342), (892, 22099), (902, 21854), (1078, 18286), (1148, 17171), (1561, 12628), (1804, 10927), (2009, 9812), (2156, 9143), (2453, 8036), (3122, 6314), (3157, 6244), (4018, 4906)]