21726009

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{257}}^1$

素因数の和:398

約数の個数: 32

約数和(自身を含む): 33684480

約数和(自身を除く): 11958471

約数列:

[1, 3, 9, 27, 31, 93, 101, 257, 279, 303, 771, 837, 909, 2313, 2727, 3131, 6939, 7967, 9393, 23901, 25957, 28179, 71703, 77871, 84537, 215109, 233613, 700839, 804667, 2414001, 7242003, 21726009]

約数ペア:

[(1, 21726009), (3, 7242003), (9, 2414001), (27, 804667), (31, 700839), (93, 233613), (101, 215109), (257, 84537), (279, 77871), (303, 71703), (771, 28179), (837, 25957), (909, 23901), (2313, 9393), (2727, 7967), (3131, 6939)]