21156928

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{431}}^1$

素因数の和:515

約数の個数: 56

約数和(自身を含む): 46085760

約数和(自身を除く): 24928832

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 59, 64, 104, 118, 208, 236, 416, 431, 472, 767, 832, 862, 944, 1534, 1724, 1888, 3068, 3448, 3776, 5603, 6136, 6896, 11206, 12272, 13792, 22412, 24544, 25429, 27584, 44824, 49088, 50858, 89648, 101716, 179296, 203432, 330577, 358592, 406864, 661154, 813728, 1322308, 1627456, 2644616, 5289232, 10578464, 21156928]

約数ペア:

[(1, 21156928), (2, 10578464), (4, 5289232), (8, 2644616), (13, 1627456), (16, 1322308), (26, 813728), (32, 661154), (52, 406864), (59, 358592), (64, 330577), (104, 203432), (118, 179296), (208, 101716), (236, 89648), (416, 50858), (431, 49088), (472, 44824), (767, 27584), (832, 25429), (862, 24544), (944, 22412), (1534, 13792), (1724, 12272), (1888, 11206), (3068, 6896), (3448, 6136), (3776, 5603)]