21731721

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{131}}^1\times {\mathrm{457}}^1$

素因数の和:613

約数の個数: 24

約数和(自身を含む): 32162592

約数和(自身を除く): 10430871

約数列:

[1, 3, 11, 33, 121, 131, 363, 393, 457, 1371, 1441, 4323, 5027, 15081, 15851, 47553, 55297, 59867, 165891, 179601, 658537, 1975611, 7243907, 21731721]

約数ペア:

[(1, 21731721), (3, 7243907), (11, 1975611), (33, 658537), (121, 179601), (131, 165891), (363, 59867), (393, 55297), (457, 47553), (1371, 15851), (1441, 15081), (4323, 5027)]