21589821

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 36324288

約数和(自身を除く): 14734467

約数列:

[1, 3, 9, 11, 27, 33, 41, 81, 99, 123, 197, 243, 297, 369, 451, 591, 891, 1107, 1353, 1773, 2167, 2673, 3321, 4059, 5319, 6501, 8077, 9963, 12177, 15957, 19503, 24231, 36531, 47871, 58509, 72693, 88847, 109593, 175527, 218079, 266541, 526581, 654237, 799623, 1962711, 2398869, 7196607, 21589821]

約数ペア:

[(1, 21589821), (3, 7196607), (9, 2398869), (11, 1962711), (27, 799623), (33, 654237), (41, 526581), (81, 266541), (99, 218079), (123, 175527), (197, 109593), (243, 88847), (297, 72693), (369, 58509), (451, 47871), (591, 36531), (891, 24231), (1107, 19503), (1353, 15957), (1773, 12177), (2167, 9963), (2673, 8077), (3321, 6501), (4059, 5319)]