20428268

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 45061632

約数和(自身を除く): 24633364

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 43, 47, 76, 86, 94, 133, 172, 188, 266, 301, 329, 361, 532, 602, 658, 722, 817, 893, 1204, 1316, 1444, 1634, 1786, 2021, 2527, 3268, 3572, 4042, 5054, 5719, 6251, 8084, 10108, 11438, 12502, 14147, 15523, 16967, 22876, 25004, 28294, 31046, 33934, 38399, 56588, 62092, 67868, 76798, 108661, 118769, 153596, 217322, 237538, 268793, 434644, 475076, 537586, 729581, 1075172, 1459162, 2918324, 5107067, 10214134, 20428268]

約数ペア:

[(1, 20428268), (2, 10214134), (4, 5107067), (7, 2918324), (14, 1459162), (19, 1075172), (28, 729581), (38, 537586), (43, 475076), (47, 434644), (76, 268793), (86, 237538), (94, 217322), (133, 153596), (172, 118769), (188, 108661), (266, 76798), (301, 67868), (329, 62092), (361, 56588), (532, 38399), (602, 33934), (658, 31046), (722, 28294), (817, 25004), (893, 22876), (1204, 16967), (1316, 15523), (1444, 14147), (1634, 12502), (1786, 11438), (2021, 10108), (2527, 8084), (3268, 6251), (3572, 5719), (4042, 5054)]