21157881

素因数分解:

$3^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{727}}^1$

素因数の和:928

約数の個数: 16

約数和(自身を含む): 28828800

約数和(自身を除く): 7670919

約数列:

[1, 3, 89, 109, 267, 327, 727, 2181, 9701, 29103, 64703, 79243, 194109, 237729, 7052627, 21157881]

約数ペア:

[(1, 21157881), (3, 7052627), (89, 237729), (109, 194109), (267, 79243), (327, 64703), (727, 29103), (2181, 9701)]