21605168

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{431}}^1$

素因数の和:693

約数の個数: 40

約数和(自身を含む): 45372096

約数和(自身を除く): 23766928

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 241, 431, 482, 862, 964, 1724, 1928, 3133, 3448, 3856, 5603, 6266, 6896, 11206, 12532, 22412, 25064, 44824, 50128, 89648, 103871, 207742, 415484, 830968, 1350323, 1661936, 2700646, 5401292, 10802584, 21605168]

約数ペア:

[(1, 21605168), (2, 10802584), (4, 5401292), (8, 2700646), (13, 1661936), (16, 1350323), (26, 830968), (52, 415484), (104, 207742), (208, 103871), (241, 89648), (431, 50128), (482, 44824), (862, 25064), (964, 22412), (1724, 12532), (1928, 11206), (3133, 6896), (3448, 6266), (3856, 5603)]