18364720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{509}}^1$

素因数の和:574

約数の個数: 80

約数和(自身を含む): 47809440

約数和(自身を除く): 29444720

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 41, 44, 55, 80, 82, 88, 110, 164, 176, 205, 220, 328, 410, 440, 451, 509, 656, 820, 880, 902, 1018, 1640, 1804, 2036, 2255, 2545, 3280, 3608, 4072, 4510, 5090, 5599, 7216, 8144, 9020, 10180, 11198, 18040, 20360, 20869, 22396, 27995, 36080, 40720, 41738, 44792, 55990, 83476, 89584, 104345, 111980, 166952, 208690, 223960, 229559, 333904, 417380, 447920, 459118, 834760, 918236, 1147795, 1669520, 1836472, 2295590, 3672944, 4591180, 9182360, 18364720]

約数ペア:

[(1, 18364720), (2, 9182360), (4, 4591180), (5, 3672944), (8, 2295590), (10, 1836472), (11, 1669520), (16, 1147795), (20, 918236), (22, 834760), (40, 459118), (41, 447920), (44, 417380), (55, 333904), (80, 229559), (82, 223960), (88, 208690), (110, 166952), (164, 111980), (176, 104345), (205, 89584), (220, 83476), (328, 55990), (410, 44792), (440, 41738), (451, 40720), (509, 36080), (656, 27995), (820, 22396), (880, 20869), (902, 20360), (1018, 18040), (1640, 11198), (1804, 10180), (2036, 9020), (2255, 8144), (2545, 7216), (3280, 5599), (3608, 5090), (4072, 4510)]