21216411

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{5573}}^1$

素因数の和:5632

約数の個数: 20

約数和(自身を含む): 32373792

約数和(自身を除く): 11157381

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 5573, 16719, 50157, 150471, 261931, 451413, 785793, 2357379, 7072137, 21216411]

約数ペア:

[(1, 21216411), (3, 7072137), (9, 2357379), (27, 785793), (47, 451413), (81, 261931), (141, 150471), (423, 50157), (1269, 16719), (3807, 5573)]