21130965

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 38158848

約数和(自身を除く): 17027883

約数列:

[1, 3, 5, 9, 15, 45, 47, 97, 103, 141, 235, 291, 309, 423, 485, 515, 705, 873, 927, 1455, 1545, 2115, 4365, 4559, 4635, 4841, 9991, 13677, 14523, 22795, 24205, 29973, 41031, 43569, 49955, 68385, 72615, 89919, 149865, 205155, 217845, 449595, 469577, 1408731, 2347885, 4226193, 7043655, 21130965]

約数ペア:

[(1, 21130965), (3, 7043655), (5, 4226193), (9, 2347885), (15, 1408731), (45, 469577), (47, 449595), (97, 217845), (103, 205155), (141, 149865), (235, 89919), (291, 72615), (309, 68385), (423, 49955), (485, 43569), (515, 41031), (705, 29973), (873, 24205), (927, 22795), (1455, 14523), (1545, 13677), (2115, 9991), (4365, 4841), (4559, 4635)]