20979712

素因数分解:

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

素因数の和:236

約数の個数: 56

約数和(自身を含む): 45413676

約数和(自身を除く): 24433964

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 197, 208, 256, 394, 416, 512, 788, 832, 1024, 1576, 1664, 2048, 2561, 3152, 3328, 4096, 5122, 6304, 6656, 8192, 10244, 12608, 13312, 20488, 25216, 26624, 40976, 50432, 53248, 81952, 100864, 106496, 163904, 201728, 327808, 403456, 655616, 806912, 1311232, 1613824, 2622464, 5244928, 10489856, 20979712]

約数ペア:

[(1, 20979712), (2, 10489856), (4, 5244928), (8, 2622464), (13, 1613824), (16, 1311232), (26, 806912), (32, 655616), (52, 403456), (64, 327808), (104, 201728), (128, 163904), (197, 106496), (208, 100864), (256, 81952), (394, 53248), (416, 50432), (512, 40976), (788, 26624), (832, 25216), (1024, 20488), (1576, 13312), (1664, 12608), (2048, 10244), (2561, 8192), (3152, 6656), (3328, 6304), (4096, 5122)]