21940775

素因数分解:

$5^2\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{263}}^1$

素因数の和:391

約数の個数: 24

約数和(自身を含む): 28283904

約数和(自身を除く): 6343129

約数列:

[1, 5, 25, 47, 71, 235, 263, 355, 1175, 1315, 1775, 3337, 6575, 12361, 16685, 18673, 61805, 83425, 93365, 309025, 466825, 877631, 4388155, 21940775]

約数ペア:

[(1, 21940775), (5, 4388155), (25, 877631), (47, 466825), (71, 309025), (235, 93365), (263, 83425), (355, 61805), (1175, 18673), (1315, 16685), (1775, 12361), (3337, 6575)]