21888981

素因数分解:

$3^3\times {\mathrm{47}}^2\times {\mathrm{367}}^1$

素因数の和:470

約数の個数: 24

約数和(自身を含む): 33223040

約数和(自身を除く): 11334059

約数列:

[1, 3, 9, 27, 47, 141, 367, 423, 1101, 1269, 2209, 3303, 6627, 9909, 17249, 19881, 51747, 59643, 155241, 465723, 810703, 2432109, 7296327, 21888981]

約数ペア:

[(1, 21888981), (3, 7296327), (9, 2432109), (27, 810703), (47, 465723), (141, 155241), (367, 59643), (423, 51747), (1101, 19881), (1269, 17249), (2209, 9909), (3303, 6627)]