21808808

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:334

約数の個数: 64

約数和(自身を含む): 49920000

約数和(自身を除く): 28111192

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 103, 133, 152, 199, 206, 266, 398, 412, 532, 721, 796, 824, 1064, 1393, 1442, 1592, 1957, 2786, 2884, 3781, 3914, 5572, 5768, 7562, 7828, 11144, 13699, 15124, 15656, 20497, 26467, 27398, 30248, 40994, 52934, 54796, 81988, 105868, 109592, 143479, 163976, 211736, 286958, 389443, 573916, 778886, 1147832, 1557772, 2726101, 3115544, 5452202, 10904404, 21808808]

約数ペア:

[(1, 21808808), (2, 10904404), (4, 5452202), (7, 3115544), (8, 2726101), (14, 1557772), (19, 1147832), (28, 778886), (38, 573916), (56, 389443), (76, 286958), (103, 211736), (133, 163976), (152, 143479), (199, 109592), (206, 105868), (266, 81988), (398, 54796), (412, 52934), (532, 40994), (721, 30248), (796, 27398), (824, 26467), (1064, 20497), (1393, 15656), (1442, 15124), (1592, 13699), (1957, 11144), (2786, 7828), (2884, 7562), (3781, 5768), (3914, 5572)]