81347740

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^3\times {\mathrm{593}}^1$

素因数の和:659

約数の個数: 48

約数和(自身を含む): 180623520

約数和(自身を除く): 99275780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 361, 380, 593, 722, 1186, 1444, 1805, 2372, 2965, 3610, 5930, 6859, 7220, 11267, 11860, 13718, 22534, 27436, 34295, 45068, 56335, 68590, 112670, 137180, 214073, 225340, 428146, 856292, 1070365, 2140730, 4067387, 4281460, 8134774, 16269548, 20336935, 40673870, 81347740]

約数ペア:

[(1, 81347740), (2, 40673870), (4, 20336935), (5, 16269548), (10, 8134774), (19, 4281460), (20, 4067387), (38, 2140730), (76, 1070365), (95, 856292), (190, 428146), (361, 225340), (380, 214073), (593, 137180), (722, 112670), (1186, 68590), (1444, 56335), (1805, 45068), (2372, 34295), (2965, 27436), (3610, 22534), (5930, 13718), (6859, 11860), (7220, 11267)]