19918756

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{359}}^1$

素因数の和:484

約数の個数: 48

約数和(自身を含む): 41489280

約数和(自身を除く): 21570524

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 97, 143, 194, 286, 359, 388, 572, 718, 1067, 1261, 1436, 2134, 2522, 3949, 4268, 4667, 5044, 7898, 9334, 13871, 15796, 18668, 27742, 34823, 51337, 55484, 69646, 102674, 139292, 205348, 383053, 452699, 766106, 905398, 1532212, 1810796, 4979689, 9959378, 19918756]

約数ペア:

[(1, 19918756), (2, 9959378), (4, 4979689), (11, 1810796), (13, 1532212), (22, 905398), (26, 766106), (44, 452699), (52, 383053), (97, 205348), (143, 139292), (194, 102674), (286, 69646), (359, 55484), (388, 51337), (572, 34823), (718, 27742), (1067, 18668), (1261, 15796), (1436, 13871), (2134, 9334), (2522, 7898), (3949, 5044), (4268, 4667)]