20382725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:170

約数の個数: 48

約数和(自身を含む): 29998080

約数和(自身を除く): 9615355

約数列:

[1, 5, 11, 19, 25, 47, 55, 83, 95, 209, 235, 275, 415, 475, 517, 893, 913, 1045, 1175, 1577, 2075, 2585, 3901, 4465, 4565, 5225, 7885, 9823, 12925, 17347, 19505, 22325, 22825, 39425, 42911, 49115, 74119, 86735, 97525, 214555, 245575, 370595, 433675, 815309, 1072775, 1852975, 4076545, 20382725]

約数ペア:

[(1, 20382725), (5, 4076545), (11, 1852975), (19, 1072775), (25, 815309), (47, 433675), (55, 370595), (83, 245575), (95, 214555), (209, 97525), (235, 86735), (275, 74119), (415, 49115), (475, 42911), (517, 39425), (893, 22825), (913, 22325), (1045, 19505), (1175, 17347), (1577, 12925), (2075, 9823), (2585, 7885), (3901, 5225), (4465, 4565)]