21129976

素因数分解:

$2^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2837}}^1$

素因数の和:2876

約数の個数: 48

約数和(自身を含む): 48529800

約数和(自身を除く): 27399824

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, 2837, 3724, 5674, 7448, 11348, 19859, 22696, 39718, 53903, 79436, 107806, 139013, 158872, 215612, 278026, 377321, 431224, 556052, 754642, 1112104, 1509284, 2641247, 3018568, 5282494, 10564988, 21129976]

約数ペア:

[(1, 21129976), (2, 10564988), (4, 5282494), (7, 3018568), (8, 2641247), (14, 1509284), (19, 1112104), (28, 754642), (38, 556052), (49, 431224), (56, 377321), (76, 278026), (98, 215612), (133, 158872), (152, 139013), (196, 107806), (266, 79436), (392, 53903), (532, 39718), (931, 22696), (1064, 19859), (1862, 11348), (2837, 7448), (3724, 5674)]