21251285

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{8221}}^1$

素因数の和:8284

約数の個数: 16

約数和(自身を含む): 28415232

約数和(自身を除く): 7163947

約数列:

[1, 5, 11, 47, 55, 235, 517, 2585, 8221, 41105, 90431, 386387, 452155, 1931935, 4250257, 21251285]

約数ペア:

[(1, 21251285), (5, 4250257), (11, 1931935), (47, 452155), (55, 386387), (235, 90431), (517, 41105), (2585, 8221)]