21308728

素因数分解:

$2^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2861}}^1$

素因数の和:2900

約数の個数: 48

約数和(自身を含む): 48940200

約数和(自身を除く): 27631472

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 49, 56, 76, 98, 133, 152, 196, 266, 392, 532, 931, 1064, 1862, 2861, 3724, 5722, 7448, 11444, 20027, 22888, 40054, 54359, 80108, 108718, 140189, 160216, 217436, 280378, 380513, 434872, 560756, 761026, 1121512, 1522052, 2663591, 3044104, 5327182, 10654364, 21308728]

約数ペア:

[(1, 21308728), (2, 10654364), (4, 5327182), (7, 3044104), (8, 2663591), (14, 1522052), (19, 1121512), (28, 761026), (38, 560756), (49, 434872), (56, 380513), (76, 280378), (98, 217436), (133, 160216), (152, 140189), (196, 108718), (266, 80108), (392, 54359), (532, 40054), (931, 22888), (1064, 20027), (1862, 11444), (2861, 7448), (3724, 5722)]