639188

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{199}}^1$

素因数の和:287

約数の個数: 24

約数和(自身を含む): 1243200

約数和(自身を除く): 604012

約数列:

[1, 2, 4, 11, 22, 44, 73, 146, 199, 292, 398, 796, 803, 1606, 2189, 3212, 4378, 8756, 14527, 29054, 58108, 159797, 319594, 639188]

約数ペア:

[(1, 639188), (2, 319594), (4, 159797), (11, 58108), (22, 29054), (44, 14527), (73, 8756), (146, 4378), (199, 3212), (292, 2189), (398, 1606), (796, 803)]