21660969

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{193}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 33523200

約数和(自身を除く): 11862231

約数列:

[1, 3, 11, 19, 33, 57, 179, 193, 209, 537, 579, 627, 1969, 2123, 3401, 3667, 5907, 6369, 10203, 11001, 34547, 37411, 40337, 103641, 112233, 121011, 380017, 656393, 1140051, 1969179, 7220323, 21660969]

約数ペア:

[(1, 21660969), (3, 7220323), (11, 1969179), (19, 1140051), (33, 656393), (57, 380017), (179, 121011), (193, 112233), (209, 103641), (537, 40337), (579, 37411), (627, 34547), (1969, 11001), (2123, 10203), (3401, 6369), (3667, 5907)]