21486368

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{311}}^1$

素因数の和:465

約数の個数: 48

約数和(自身を含む): 45287424

約数和(自身を除く): 23801056

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 127, 136, 254, 272, 311, 508, 544, 622, 1016, 1244, 2032, 2159, 2488, 4064, 4318, 4976, 5287, 8636, 9952, 10574, 17272, 21148, 34544, 39497, 42296, 69088, 78994, 84592, 157988, 169184, 315976, 631952, 671449, 1263904, 1342898, 2685796, 5371592, 10743184, 21486368]

約数ペア:

[(1, 21486368), (2, 10743184), (4, 5371592), (8, 2685796), (16, 1342898), (17, 1263904), (32, 671449), (34, 631952), (68, 315976), (127, 169184), (136, 157988), (254, 84592), (272, 78994), (311, 69088), (508, 42296), (544, 39497), (622, 34544), (1016, 21148), (1244, 17272), (2032, 10574), (2159, 9952), (2488, 8636), (4064, 5287), (4318, 4976)]