20005480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2393}}^1$

素因数の和:2434

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 31704920

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 152, 190, 209, 220, 380, 418, 440, 760, 836, 1045, 1672, 2090, 2393, 4180, 4786, 8360, 9572, 11965, 19144, 23930, 26323, 45467, 47860, 52646, 90934, 95720, 105292, 131615, 181868, 210584, 227335, 263230, 363736, 454670, 500137, 526460, 909340, 1000274, 1052920, 1818680, 2000548, 2500685, 4001096, 5001370, 10002740, 20005480]

約数ペア:

[(1, 20005480), (2, 10002740), (4, 5001370), (5, 4001096), (8, 2500685), (10, 2000548), (11, 1818680), (19, 1052920), (20, 1000274), (22, 909340), (38, 526460), (40, 500137), (44, 454670), (55, 363736), (76, 263230), (88, 227335), (95, 210584), (110, 181868), (152, 131615), (190, 105292), (209, 95720), (220, 90934), (380, 52646), (418, 47860), (440, 45467), (760, 26323), (836, 23930), (1045, 19144), (1672, 11965), (2090, 9572), (2393, 8360), (4180, 4786)]