21259568

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{607}}^1$

素因数の和:825

約数の個数: 40

約数和(自身を含む): 45235200

約数和(自身を除く): 23975632

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 199, 398, 607, 796, 1214, 1592, 2189, 2428, 3184, 4378, 4856, 6677, 8756, 9712, 13354, 17512, 26708, 35024, 53416, 106832, 120793, 241586, 483172, 966344, 1328723, 1932688, 2657446, 5314892, 10629784, 21259568]

約数ペア:

[(1, 21259568), (2, 10629784), (4, 5314892), (8, 2657446), (11, 1932688), (16, 1328723), (22, 966344), (44, 483172), (88, 241586), (176, 120793), (199, 106832), (398, 53416), (607, 35024), (796, 26708), (1214, 17512), (1592, 13354), (2189, 9712), (2428, 8756), (3184, 6677), (4378, 4856)]