21691460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3779}}^1$

素因数の和:3836

約数の個数: 48

約数和(自身を含む): 53343360

約数和(自身を除く): 31651900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3779, 5740, 7558, 15116, 18895, 26453, 37790, 52906, 75580, 105812, 132265, 154939, 264530, 309878, 529060, 619756, 774695, 1084573, 1549390, 2169146, 3098780, 4338292, 5422865, 10845730, 21691460]

約数ペア:

[(1, 21691460), (2, 10845730), (4, 5422865), (5, 4338292), (7, 3098780), (10, 2169146), (14, 1549390), (20, 1084573), (28, 774695), (35, 619756), (41, 529060), (70, 309878), (82, 264530), (140, 154939), (164, 132265), (205, 105812), (287, 75580), (410, 52906), (574, 37790), (820, 26453), (1148, 18895), (1435, 15116), (2870, 7558), (3779, 5740)]