21305732

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{277}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 44462208

約数和(自身を除く): 23156476

約数列:

[1, 2, 4, 7, 14, 28, 41, 67, 82, 134, 164, 268, 277, 287, 469, 554, 574, 938, 1108, 1148, 1876, 1939, 2747, 3878, 5494, 7756, 10988, 11357, 18559, 19229, 22714, 37118, 38458, 45428, 74236, 76916, 79499, 129913, 158998, 259826, 317996, 519652, 760919, 1521838, 3043676, 5326433, 10652866, 21305732]

約数ペア:

[(1, 21305732), (2, 10652866), (4, 5326433), (7, 3043676), (14, 1521838), (28, 760919), (41, 519652), (67, 317996), (82, 259826), (134, 158998), (164, 129913), (268, 79499), (277, 76916), (287, 74236), (469, 45428), (554, 38458), (574, 37118), (938, 22714), (1108, 19229), (1148, 18559), (1876, 11357), (1939, 10988), (2747, 7756), (3878, 5494)]