20988884

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:488

約数の個数: 48

約数和(自身を含む): 44029440

約数和(自身を除く): 23040556

約数列:

[1, 2, 4, 7, 14, 28, 41, 47, 82, 94, 164, 188, 287, 329, 389, 574, 658, 778, 1148, 1316, 1556, 1927, 2723, 3854, 5446, 7708, 10892, 13489, 15949, 18283, 26978, 31898, 36566, 53956, 63796, 73132, 111643, 127981, 223286, 255962, 446572, 511924, 749603, 1499206, 2998412, 5247221, 10494442, 20988884]

約数ペア:

[(1, 20988884), (2, 10494442), (4, 5247221), (7, 2998412), (14, 1499206), (28, 749603), (41, 511924), (47, 446572), (82, 255962), (94, 223286), (164, 127981), (188, 111643), (287, 73132), (329, 63796), (389, 53956), (574, 36566), (658, 31898), (778, 26978), (1148, 18283), (1316, 15949), (1556, 13489), (1927, 10892), (2723, 7708), (3854, 5446)]