21169648

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{839}}^1$

素因数の和:949

約数の個数: 40

約数和(自身を含む): 43747200

約数和(自身を除く): 22577552

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 83, 152, 166, 304, 332, 664, 839, 1328, 1577, 1678, 3154, 3356, 6308, 6712, 12616, 13424, 15941, 25232, 31882, 63764, 69637, 127528, 139274, 255056, 278548, 557096, 1114192, 1323103, 2646206, 5292412, 10584824, 21169648]

約数ペア:

[(1, 21169648), (2, 10584824), (4, 5292412), (8, 2646206), (16, 1323103), (19, 1114192), (38, 557096), (76, 278548), (83, 255056), (152, 139274), (166, 127528), (304, 69637), (332, 63764), (664, 31882), (839, 25232), (1328, 15941), (1577, 13424), (1678, 12616), (3154, 6712), (3356, 6308)]