19890208

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{349}}^1$

素因数の和:509

約数の個数: 48

約数和(自身を含む): 42600600

約数和(自身を除く): 22710392

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 137, 208, 274, 349, 416, 548, 698, 1096, 1396, 1781, 2192, 2792, 3562, 4384, 4537, 5584, 7124, 9074, 11168, 14248, 18148, 28496, 36296, 47813, 56992, 72592, 95626, 145184, 191252, 382504, 621569, 765008, 1243138, 1530016, 2486276, 4972552, 9945104, 19890208]

約数ペア:

[(1, 19890208), (2, 9945104), (4, 4972552), (8, 2486276), (13, 1530016), (16, 1243138), (26, 765008), (32, 621569), (52, 382504), (104, 191252), (137, 145184), (208, 95626), (274, 72592), (349, 56992), (416, 47813), (548, 36296), (698, 28496), (1096, 18148), (1396, 14248), (1781, 11168), (2192, 9074), (2792, 7124), (3562, 5584), (4384, 4537)]