20085988

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{691}}^1$

素因数の和:764

約数の個数: 36

約数和(自身を含む): 39003888

約数和(自身を除く): 18917900

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 169, 172, 338, 559, 676, 691, 1118, 1382, 2236, 2764, 7267, 8983, 14534, 17966, 29068, 29713, 35932, 59426, 116779, 118852, 233558, 386269, 467116, 772538, 1545076, 5021497, 10042994, 20085988]

約数ペア:

[(1, 20085988), (2, 10042994), (4, 5021497), (13, 1545076), (26, 772538), (43, 467116), (52, 386269), (86, 233558), (169, 118852), (172, 116779), (338, 59426), (559, 35932), (676, 29713), (691, 29068), (1118, 17966), (1382, 14534), (2236, 8983), (2764, 7267)]