21050480

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1259}}^1$

素因数の和:1302

約数の個数: 80

約数和(自身を含む): 56246400

約数和(自身を除く): 35195920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 176, 190, 209, 220, 304, 380, 418, 440, 760, 836, 880, 1045, 1259, 1520, 1672, 2090, 2518, 3344, 4180, 5036, 6295, 8360, 10072, 12590, 13849, 16720, 20144, 23921, 25180, 27698, 47842, 50360, 55396, 69245, 95684, 100720, 110792, 119605, 138490, 191368, 221584, 239210, 263131, 276980, 382736, 478420, 526262, 553960, 956840, 1052524, 1107920, 1315655, 1913680, 2105048, 2631310, 4210096, 5262620, 10525240, 21050480]

約数ペア:

[(1, 21050480), (2, 10525240), (4, 5262620), (5, 4210096), (8, 2631310), (10, 2105048), (11, 1913680), (16, 1315655), (19, 1107920), (20, 1052524), (22, 956840), (38, 553960), (40, 526262), (44, 478420), (55, 382736), (76, 276980), (80, 263131), (88, 239210), (95, 221584), (110, 191368), (152, 138490), (176, 119605), (190, 110792), (209, 100720), (220, 95684), (304, 69245), (380, 55396), (418, 50360), (440, 47842), (760, 27698), (836, 25180), (880, 23921), (1045, 20144), (1259, 16720), (1520, 13849), (1672, 12590), (2090, 10072), (2518, 8360), (3344, 6295), (4180, 5036)]