19909904

素因数分解:

$2^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:228

約数の個数: 80

約数和(自身を含む): 47139840

約数和(自身を除く): 27229936

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 46, 56, 59, 92, 112, 118, 131, 161, 184, 236, 262, 322, 368, 413, 472, 524, 644, 826, 917, 944, 1048, 1288, 1357, 1652, 1834, 2096, 2576, 2714, 3013, 3304, 3668, 5428, 6026, 6608, 7336, 7729, 9499, 10856, 12052, 14672, 15458, 18998, 21091, 21712, 24104, 30916, 37996, 42182, 48208, 54103, 61832, 75992, 84364, 108206, 123664, 151984, 168728, 177767, 216412, 337456, 355534, 432824, 711068, 865648, 1244369, 1422136, 2488738, 2844272, 4977476, 9954952, 19909904]

約数ペア:

[(1, 19909904), (2, 9954952), (4, 4977476), (7, 2844272), (8, 2488738), (14, 1422136), (16, 1244369), (23, 865648), (28, 711068), (46, 432824), (56, 355534), (59, 337456), (92, 216412), (112, 177767), (118, 168728), (131, 151984), (161, 123664), (184, 108206), (236, 84364), (262, 75992), (322, 61832), (368, 54103), (413, 48208), (472, 42182), (524, 37996), (644, 30916), (826, 24104), (917, 21712), (944, 21091), (1048, 18998), (1288, 15458), (1357, 14672), (1652, 12052), (1834, 10856), (2096, 9499), (2576, 7729), (2714, 7336), (3013, 6608), (3304, 6026), (3668, 5428)]