21507669

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{8269}}^1$

素因数の和:8309

約数の個数: 18

約数和(自身を含む): 33005570

約数和(自身を除く): 11497901

約数列:

[1, 3, 9, 17, 51, 153, 289, 867, 2601, 8269, 24807, 74421, 140573, 421719, 1265157, 2389741, 7169223, 21507669]

約数ペア:

[(1, 21507669), (3, 7169223), (9, 2389741), (17, 1265157), (51, 421719), (153, 140573), (289, 74421), (867, 24807), (2601, 8269)]