21137272

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{563}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 45125640

約数和(自身を除く): 23988368

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 152, 247, 361, 494, 563, 722, 988, 1126, 1444, 1976, 2252, 2888, 4504, 4693, 7319, 9386, 10697, 14638, 18772, 21394, 29276, 37544, 42788, 58552, 85576, 139061, 203243, 278122, 406486, 556244, 812972, 1112488, 1625944, 2642159, 5284318, 10568636, 21137272]

約数ペア:

[(1, 21137272), (2, 10568636), (4, 5284318), (8, 2642159), (13, 1625944), (19, 1112488), (26, 812972), (38, 556244), (52, 406486), (76, 278122), (104, 203243), (152, 139061), (247, 85576), (361, 58552), (494, 42788), (563, 37544), (722, 29276), (988, 21394), (1126, 18772), (1444, 14638), (1976, 10697), (2252, 9386), (2888, 7319), (4504, 4693)]