21490191

素因数分解:

$3^6\times {\mathrm{41}}^1\times {\mathrm{719}}^1$

素因数の和:778

約数の個数: 28

約数和(自身を含む): 33052320

約数和(自身を除く): 11562129

約数列:

[1, 3, 9, 27, 41, 81, 123, 243, 369, 719, 729, 1107, 2157, 3321, 6471, 9963, 19413, 29479, 29889, 58239, 88437, 174717, 265311, 524151, 795933, 2387799, 7163397, 21490191]

約数ペア:

[(1, 21490191), (3, 7163397), (9, 2387799), (27, 795933), (41, 524151), (81, 265311), (123, 174717), (243, 88437), (369, 58239), (719, 29889), (729, 29479), (1107, 19413), (2157, 9963), (3321, 6471)]