21251391

素因数分解:

$3^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{5591}}^1$

素因数の和:5782

約数の個数: 16

約数和(自身を含む): 32567808

約数和(自身を除く): 11316417

約数列:

[1, 3, 7, 21, 181, 543, 1267, 3801, 5591, 16773, 39137, 117411, 1011971, 3035913, 7083797, 21251391]

約数ペア:

[(1, 21251391), (3, 7083797), (7, 3035913), (21, 1011971), (181, 117411), (543, 39137), (1267, 16773), (3801, 5591)]