21281211

素因数分解:

$3^5\times 7^1\times {\mathrm{12511}}^1$

素因数の和:12533

約数の個数: 24

約数和(自身を含む): 36434944

約数和(自身を除く): 15153733

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 12511, 37533, 87577, 112599, 262731, 337797, 788193, 1013391, 2364579, 3040173, 7093737, 21281211]

約数ペア:

[(1, 21281211), (3, 7093737), (7, 3040173), (9, 2364579), (21, 1013391), (27, 788193), (63, 337797), (81, 262731), (189, 112599), (243, 87577), (567, 37533), (1701, 12511)]