21497189

素因数分解:

$7^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{181}}^1$

素因数の和:273

約数の個数: 24

約数和(自身を含む): 26627328

約数和(自身を除く): 5130139

約数列:

[1, 7, 19, 47, 133, 181, 329, 361, 893, 1267, 2527, 3439, 6251, 8507, 16967, 24073, 59549, 65341, 118769, 161633, 457387, 1131431, 3071027, 21497189]

約数ペア:

[(1, 21497189), (7, 3071027), (19, 1131431), (47, 457387), (133, 161633), (181, 118769), (329, 65341), (361, 59549), (893, 24073), (1267, 16967), (2527, 8507), (3439, 6251)]