21963136

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{197}}^1$

素因数の和:291

約数の個数: 64

約数和(自身を含む): 48066480

約数和(自身を除く): 26103344

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 67, 104, 128, 134, 197, 208, 268, 394, 416, 536, 788, 832, 871, 1072, 1576, 1664, 1742, 2144, 2561, 3152, 3484, 4288, 5122, 6304, 6968, 8576, 10244, 12608, 13199, 13936, 20488, 25216, 26398, 27872, 40976, 52796, 55744, 81952, 105592, 111488, 163904, 171587, 211184, 327808, 343174, 422368, 686348, 844736, 1372696, 1689472, 2745392, 5490784, 10981568, 21963136]

約数ペア:

[(1, 21963136), (2, 10981568), (4, 5490784), (8, 2745392), (13, 1689472), (16, 1372696), (26, 844736), (32, 686348), (52, 422368), (64, 343174), (67, 327808), (104, 211184), (128, 171587), (134, 163904), (197, 111488), (208, 105592), (268, 81952), (394, 55744), (416, 52796), (536, 40976), (788, 27872), (832, 26398), (871, 25216), (1072, 20488), (1576, 13936), (1664, 13199), (1742, 12608), (2144, 10244), (2561, 8576), (3152, 6968), (3484, 6304), (4288, 5122)]