20465991

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{24989}}^1$

素因数の和:25015

約数の個数: 24

約数和(自身を含む): 36385440

約数和(自身を除く): 15919449

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 24989, 74967, 174923, 224901, 324857, 524769, 974571, 1574307, 2273999, 2923713, 6821997, 20465991]

約数ペア:

[(1, 20465991), (3, 6821997), (7, 2923713), (9, 2273999), (13, 1574307), (21, 974571), (39, 524769), (63, 324857), (91, 224901), (117, 174923), (273, 74967), (819, 24989)]