20537517

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{977}}^1$

素因数の和:1018

約数の個数: 48

約数和(自身を含む): 37461312

約数和(自身を除く): 16923795

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 49, 77, 91, 143, 147, 231, 273, 429, 539, 637, 977, 1001, 1617, 1911, 2931, 3003, 6839, 7007, 10747, 12701, 20517, 21021, 32241, 38103, 47873, 75229, 88907, 139711, 143619, 225687, 266721, 419133, 526603, 622349, 977977, 1579809, 1867047, 2933931, 6845839, 20537517]

約数ペア:

[(1, 20537517), (3, 6845839), (7, 2933931), (11, 1867047), (13, 1579809), (21, 977977), (33, 622349), (39, 526603), (49, 419133), (77, 266721), (91, 225687), (143, 143619), (147, 139711), (231, 88907), (273, 75229), (429, 47873), (539, 38103), (637, 32241), (977, 21021), (1001, 20517), (1617, 12701), (1911, 10747), (2931, 7007), (3003, 6839)]