21285891

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{1019}}^1$

素因数の和:1247

約数の個数: 24

約数和(自身を含む): 33733440

約数和(自身を除く): 12447549

約数列:

[1, 3, 9, 11, 33, 99, 211, 633, 1019, 1899, 2321, 3057, 6963, 9171, 11209, 20889, 33627, 100881, 215009, 645027, 1935081, 2365099, 7095297, 21285891]

約数ペア:

[(1, 21285891), (3, 7095297), (9, 2365099), (11, 1935081), (33, 645027), (99, 215009), (211, 100881), (633, 33627), (1019, 20889), (1899, 11209), (2321, 9171), (3057, 6963)]