21279232

素因数分解:

$2^9\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1$

素因数の和:193

約数の個数: 80

約数和(自身を含む): 48121920

約数和(自身を除く): 26842688

約数列:

[1, 2, 4, 8, 13, 16, 23, 26, 32, 46, 52, 64, 92, 104, 128, 139, 184, 208, 256, 278, 299, 368, 416, 512, 556, 598, 736, 832, 1112, 1196, 1472, 1664, 1807, 2224, 2392, 2944, 3197, 3328, 3614, 4448, 4784, 5888, 6394, 6656, 7228, 8896, 9568, 11776, 12788, 14456, 17792, 19136, 25576, 28912, 35584, 38272, 41561, 51152, 57824, 71168, 76544, 83122, 102304, 115648, 153088, 166244, 204608, 231296, 332488, 409216, 462592, 664976, 818432, 925184, 1329952, 1636864, 2659904, 5319808, 10639616, 21279232]

約数ペア:

[(1, 21279232), (2, 10639616), (4, 5319808), (8, 2659904), (13, 1636864), (16, 1329952), (23, 925184), (26, 818432), (32, 664976), (46, 462592), (52, 409216), (64, 332488), (92, 231296), (104, 204608), (128, 166244), (139, 153088), (184, 115648), (208, 102304), (256, 83122), (278, 76544), (299, 71168), (368, 57824), (416, 51152), (512, 41561), (556, 38272), (598, 35584), (736, 28912), (832, 25576), (1112, 19136), (1196, 17792), (1472, 14456), (1664, 12788), (1807, 11776), (2224, 9568), (2392, 8896), (2944, 7228), (3197, 6656), (3328, 6394), (3614, 5888), (4448, 4784)]