1663640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 4320000

約数和(自身を除く): 2656360

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 152, 190, 199, 209, 220, 380, 398, 418, 440, 760, 796, 836, 995, 1045, 1592, 1672, 1990, 2090, 2189, 3781, 3980, 4180, 4378, 7562, 7960, 8360, 8756, 10945, 15124, 17512, 18905, 21890, 30248, 37810, 41591, 43780, 75620, 83182, 87560, 151240, 166364, 207955, 332728, 415910, 831820, 1663640]

約数ペア:

[(1, 1663640), (2, 831820), (4, 415910), (5, 332728), (8, 207955), (10, 166364), (11, 151240), (19, 87560), (20, 83182), (22, 75620), (38, 43780), (40, 41591), (44, 37810), (55, 30248), (76, 21890), (88, 18905), (95, 17512), (110, 15124), (152, 10945), (190, 8756), (199, 8360), (209, 7960), (220, 7562), (380, 4378), (398, 4180), (418, 3980), (440, 3781), (760, 2189), (796, 2090), (836, 1990), (995, 1672), (1045, 1592)]