20561216

素因数分解:

$2^6\times {\mathrm{13}}^2\times {\mathrm{1901}}^1$

素因数の和:1939

約数の個数: 42

約数和(自身を含む): 44204382

約数和(自身を除く): 23643166

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 169, 208, 338, 416, 676, 832, 1352, 1901, 2704, 3802, 5408, 7604, 10816, 15208, 24713, 30416, 49426, 60832, 98852, 121664, 197704, 321269, 395408, 642538, 790816, 1285076, 1581632, 2570152, 5140304, 10280608, 20561216]

約数ペア:

[(1, 20561216), (2, 10280608), (4, 5140304), (8, 2570152), (13, 1581632), (16, 1285076), (26, 790816), (32, 642538), (52, 395408), (64, 321269), (104, 197704), (169, 121664), (208, 98852), (338, 60832), (416, 49426), (676, 30416), (832, 24713), (1352, 15208), (1901, 10816), (2704, 7604), (3802, 5408)]