28220661

素因数分解:

$3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{4349}}^1$

素因数の和:4465

約数の個数: 24

約数和(自身を含む): 47049600

約数和(自身を除く): 18828939

約数列:

[1, 3, 7, 9, 21, 63, 103, 309, 721, 927, 2163, 4349, 6489, 13047, 30443, 39141, 91329, 273987, 447947, 1343841, 3135629, 4031523, 9406887, 28220661]

約数ペア:

[(1, 28220661), (3, 9406887), (7, 4031523), (9, 3135629), (21, 1343841), (63, 447947), (103, 273987), (309, 91329), (721, 39141), (927, 30443), (2163, 13047), (4349, 6489)]