18505487

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 26812800

約数和(自身を除く): 8307313

約数列:

[1, 7, 11, 13, 19, 49, 77, 91, 133, 139, 143, 209, 247, 539, 637, 931, 973, 1001, 1463, 1529, 1729, 1807, 2641, 2717, 6811, 7007, 10241, 10703, 12103, 12649, 18487, 19019, 19877, 29051, 34333, 74921, 88543, 129409, 133133, 139139, 203357, 240331, 377663, 973973, 1423499, 1682317, 2643641, 18505487]

約数ペア:

[(1, 18505487), (7, 2643641), (11, 1682317), (13, 1423499), (19, 973973), (49, 377663), (77, 240331), (91, 203357), (133, 139139), (139, 133133), (143, 129409), (209, 88543), (247, 74921), (539, 34333), (637, 29051), (931, 19877), (973, 19019), (1001, 18487), (1463, 12649), (1529, 12103), (1729, 10703), (1807, 10241), (2641, 7007), (2717, 6811)]