21359019

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{263}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 32845824

約数和(自身を除く): 11486805

約数列:

[1, 3, 11, 23, 33, 69, 107, 253, 263, 321, 759, 789, 1177, 2461, 2893, 3531, 6049, 7383, 8679, 18147, 27071, 28141, 66539, 81213, 84423, 199617, 309551, 647243, 928653, 1941729, 7119673, 21359019]

約数ペア:

[(1, 21359019), (3, 7119673), (11, 1941729), (23, 928653), (33, 647243), (69, 309551), (107, 199617), (253, 84423), (263, 81213), (321, 66539), (759, 28141), (789, 27071), (1177, 18147), (2461, 8679), (2893, 7383), (3531, 6049)]