21425558

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{263}}^1$

素因数の和:329

約数の個数: 48

約数和(自身を含む): 42045696

約数和(自身を除く): 20620138

約数列:

[1, 2, 7, 11, 14, 22, 23, 46, 77, 154, 161, 253, 263, 322, 506, 526, 529, 1058, 1771, 1841, 2893, 3542, 3682, 3703, 5786, 5819, 6049, 7406, 11638, 12098, 20251, 40502, 40733, 42343, 66539, 81466, 84686, 133078, 139127, 278254, 465773, 931546, 973889, 1530397, 1947778, 3060794, 10712779, 21425558]

約数ペア:

[(1, 21425558), (2, 10712779), (7, 3060794), (11, 1947778), (14, 1530397), (22, 973889), (23, 931546), (46, 465773), (77, 278254), (154, 139127), (161, 133078), (253, 84686), (263, 81466), (322, 66539), (506, 42343), (526, 40733), (529, 40502), (1058, 20251), (1771, 12098), (1841, 11638), (2893, 7406), (3542, 6049), (3682, 5819), (3703, 5786)]