21903981

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{28859}}^1$

素因数の和:28896

約数の個数: 16

約数和(自身を含む): 33246720

約数和(自身を除く): 11342739

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 28859, 86577, 317449, 663757, 952347, 1991271, 7301327, 21903981]

約数ペア:

[(1, 21903981), (3, 7301327), (11, 1991271), (23, 952347), (33, 663757), (69, 317449), (253, 86577), (759, 28859)]