21581703

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{409}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 37608480

約数和(自身を除く): 16026777

約数列:

[1, 3, 9, 11, 13, 33, 39, 41, 99, 117, 123, 143, 369, 409, 429, 451, 533, 1227, 1287, 1353, 1599, 3681, 4059, 4499, 4797, 5317, 5863, 13497, 15951, 16769, 17589, 40491, 47853, 50307, 52767, 58487, 150921, 175461, 184459, 217997, 526383, 553377, 653991, 1660131, 1961973, 2397967, 7193901, 21581703]

約数ペア:

[(1, 21581703), (3, 7193901), (9, 2397967), (11, 1961973), (13, 1660131), (33, 653991), (39, 553377), (41, 526383), (99, 217997), (117, 184459), (123, 175461), (143, 150921), (369, 58487), (409, 52767), (429, 50307), (451, 47853), (533, 40491), (1227, 17589), (1287, 16769), (1353, 15951), (1599, 13497), (3681, 5863), (4059, 5317), (4499, 4797)]