21284505

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1303}}^1$

素因数の和:1339

約数の個数: 48

約数和(自身を含む): 41623680

約数和(自身を除く): 20339175

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 121, 135, 165, 297, 363, 495, 605, 1089, 1303, 1485, 1815, 3267, 3909, 5445, 6515, 11727, 14333, 16335, 19545, 35181, 42999, 58635, 71665, 128997, 157663, 175905, 214995, 386991, 472989, 644985, 788315, 1418967, 1934955, 2364945, 4256901, 7094835, 21284505]

約数ペア:

[(1, 21284505), (3, 7094835), (5, 4256901), (9, 2364945), (11, 1934955), (15, 1418967), (27, 788315), (33, 644985), (45, 472989), (55, 386991), (99, 214995), (121, 175905), (135, 157663), (165, 128997), (297, 71665), (363, 58635), (495, 42999), (605, 35181), (1089, 19545), (1303, 16335), (1485, 14333), (1815, 11727), (3267, 6515), (3909, 5445)]