21028555009

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1753}}^1\times {\mathrm{3623}}^1$

素因数の和:5437

約数の個数: 32

約数和(自身を含む): 26849839104

約数和(自身を除く): 5821284095

約数列:

[1, 7, 11, 43, 77, 301, 473, 1753, 3311, 3623, 12271, 19283, 25361, 39853, 75379, 134981, 155789, 278971, 527653, 829169, 1090523, 1713679, 5804183, 6351119, 11995753, 44457833, 69862309, 273098117, 489036163, 1911686819, 3004079287, 21028555009]

約数ペア:

[(1, 21028555009), (7, 3004079287), (11, 1911686819), (43, 489036163), (77, 273098117), (301, 69862309), (473, 44457833), (1753, 11995753), (3311, 6351119), (3623, 5804183), (12271, 1713679), (19283, 1090523), (25361, 829169), (39853, 527653), (75379, 278971), (134981, 155789)]