20990838

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{997}}^1$

素因数の和:1053

約数の個数: 48

約数和(自身を含む): 47784240

約数和(自身を除く): 26793402

約数列:

[1, 2, 3, 6, 11, 22, 29, 33, 58, 66, 87, 121, 174, 242, 319, 363, 638, 726, 957, 997, 1914, 1994, 2991, 3509, 5982, 7018, 10527, 10967, 21054, 21934, 28913, 32901, 57826, 65802, 86739, 120637, 173478, 241274, 318043, 361911, 636086, 723822, 954129, 1908258, 3498473, 6996946, 10495419, 20990838]

約数ペア:

[(1, 20990838), (2, 10495419), (3, 6996946), (6, 3498473), (11, 1908258), (22, 954129), (29, 723822), (33, 636086), (58, 361911), (66, 318043), (87, 241274), (121, 173478), (174, 120637), (242, 86739), (319, 65802), (363, 57826), (638, 32901), (726, 28913), (957, 21934), (997, 21054), (1914, 10967), (1994, 10527), (2991, 7018), (3509, 5982)]