21189840

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12613}}^1$

素因数の和:12636

約数の個数: 80

約数和(自身を含む): 75078528

約数和(自身を除く): 53888688

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12613, 25226, 37839, 50452, 63065, 75678, 88291, 100904, 126130, 151356, 176582, 189195, 201808, 252260, 264873, 302712, 353164, 378390, 441455, 504520, 529746, 605424, 706328, 756780, 882910, 1009040, 1059492, 1324365, 1412656, 1513560, 1765820, 2118984, 2648730, 3027120, 3531640, 4237968, 5297460, 7063280, 10594920, 21189840]

約数ペア:

[(1, 21189840), (2, 10594920), (3, 7063280), (4, 5297460), (5, 4237968), (6, 3531640), (7, 3027120), (8, 2648730), (10, 2118984), (12, 1765820), (14, 1513560), (15, 1412656), (16, 1324365), (20, 1059492), (21, 1009040), (24, 882910), (28, 756780), (30, 706328), (35, 605424), (40, 529746), (42, 504520), (48, 441455), (56, 378390), (60, 353164), (70, 302712), (80, 264873), (84, 252260), (105, 201808), (112, 189195), (120, 176582), (140, 151356), (168, 126130), (210, 100904), (240, 88291), (280, 75678), (336, 63065), (420, 50452), (560, 37839), (840, 25226), (1680, 12613)]