20548880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1229}}^1$

素因数の和:1272

約数の個数: 80

約数和(自身を含む): 54907200

約数和(自身を除く): 34358320

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, 1229, 1520, 1672, 2090, 2458, 3344, 4180, 4916, 6145, 8360, 9832, 12290, 13519, 16720, 19664, 23351, 24580, 27038, 46702, 49160, 54076, 67595, 93404, 98320, 108152, 116755, 135190, 186808, 216304, 233510, 256861, 270380, 373616, 467020, 513722, 540760, 934040, 1027444, 1081520, 1284305, 1868080, 2054888, 2568610, 4109776, 5137220, 10274440, 20548880]

約数ペア:

[(1, 20548880), (2, 10274440), (4, 5137220), (5, 4109776), (8, 2568610), (10, 2054888), (11, 1868080), (16, 1284305), (19, 1081520), (20, 1027444), (22, 934040), (38, 540760), (40, 513722), (44, 467020), (55, 373616), (76, 270380), (80, 256861), (88, 233510), (95, 216304), (110, 186808), (152, 135190), (176, 116755), (190, 108152), (209, 98320), (220, 93404), (304, 67595), (380, 54076), (418, 49160), (440, 46702), (760, 27038), (836, 24580), (880, 23351), (1045, 19664), (1229, 16720), (1520, 13519), (1672, 12290), (2090, 9832), (2458, 8360), (3344, 6145), (4180, 4916)]