21148784

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{313}}^1$

素因数の和:465

約数の個数: 40

約数和(自身を含む): 42518112

約数和(自身を除く): 21369328

約数列:

[1, 2, 4, 8, 16, 41, 82, 103, 164, 206, 313, 328, 412, 626, 656, 824, 1252, 1648, 2504, 4223, 5008, 8446, 12833, 16892, 25666, 32239, 33784, 51332, 64478, 67568, 102664, 128956, 205328, 257912, 515824, 1321799, 2643598, 5287196, 10574392, 21148784]

約数ペア:

[(1, 21148784), (2, 10574392), (4, 5287196), (8, 2643598), (16, 1321799), (41, 515824), (82, 257912), (103, 205328), (164, 128956), (206, 102664), (313, 67568), (328, 64478), (412, 51332), (626, 33784), (656, 32239), (824, 25666), (1252, 16892), (1648, 12833), (2504, 8446), (4223, 5008)]