640196438

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{86771}}^1$

素因数の和:86828

約数の個数: 32

約数和(自身を含む): 1199536128

約数和(自身を除く): 559339690

約数列:

[1, 2, 7, 14, 17, 31, 34, 62, 119, 217, 238, 434, 527, 1054, 3689, 7378, 86771, 173542, 607397, 1214794, 1475107, 2689901, 2950214, 5379802, 10325749, 18829307, 20651498, 37658614, 45728317, 91456634, 320098219, 640196438]

約数ペア:

[(1, 640196438), (2, 320098219), (7, 91456634), (14, 45728317), (17, 37658614), (31, 20651498), (34, 18829307), (62, 10325749), (119, 5379802), (217, 2950214), (238, 2689901), (434, 1475107), (527, 1214794), (1054, 607397), (3689, 173542), (7378, 86771)]