20720457

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{233}}^1\times {\mathrm{241}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 30918888

約数和(自身を除く): 10198431

約数列:

[1, 3, 9, 41, 123, 233, 241, 369, 699, 723, 2097, 2169, 9553, 9881, 28659, 29643, 56153, 85977, 88929, 168459, 505377, 2302273, 6906819, 20720457]

約数ペア:

[(1, 20720457), (3, 6906819), (9, 2302273), (41, 505377), (123, 168459), (233, 88929), (241, 85977), (369, 56153), (699, 29643), (723, 28659), (2097, 9881), (2169, 9553)]