221465391

素因数分解:

$3^1\times 7^1\times {\mathrm{509}}^1\times {\mathrm{20719}}^1$

素因数の和:21238

約数の個数: 16

約数和(自身を含む): 338150400

約数和(自身を除く): 116685009

約数列:

[1, 3, 7, 21, 509, 1527, 3563, 10689, 20719, 62157, 145033, 435099, 10545971, 31637913, 73821797, 221465391]

約数ペア:

[(1, 221465391), (3, 73821797), (7, 31637913), (21, 10545971), (509, 435099), (1527, 145033), (3563, 62157), (10689, 20719)]