21261944

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 45722880

約数和(自身を除く): 24460936

約数列:

[1, 2, 4, 8, 11, 22, 41, 44, 71, 82, 83, 88, 142, 164, 166, 284, 328, 332, 451, 568, 664, 781, 902, 913, 1562, 1804, 1826, 2911, 3124, 3403, 3608, 3652, 5822, 5893, 6248, 6806, 7304, 11644, 11786, 13612, 23288, 23572, 27224, 32021, 37433, 47144, 64042, 64823, 74866, 128084, 129646, 149732, 241613, 256168, 259292, 299464, 483226, 518584, 966452, 1932904, 2657743, 5315486, 10630972, 21261944]

約数ペア:

[(1, 21261944), (2, 10630972), (4, 5315486), (8, 2657743), (11, 1932904), (22, 966452), (41, 518584), (44, 483226), (71, 299464), (82, 259292), (83, 256168), (88, 241613), (142, 149732), (164, 129646), (166, 128084), (284, 74866), (328, 64823), (332, 64042), (451, 47144), (568, 37433), (664, 32021), (781, 27224), (902, 23572), (913, 23288), (1562, 13612), (1804, 11786), (1826, 11644), (2911, 7304), (3124, 6806), (3403, 6248), (3608, 5893), (3652, 5822)]