21919311

素因数分解:

$3^2\times {\mathrm{127}}^2\times {\mathrm{151}}^1$

素因数の和:411

約数の個数: 18

約数和(自身を含む): 32123832

約数和(自身を除く): 10204521

約数列:

[1, 3, 9, 127, 151, 381, 453, 1143, 1359, 16129, 19177, 48387, 57531, 145161, 172593, 2435479, 7306437, 21919311]

約数ペア:

[(1, 21919311), (3, 7306437), (9, 2435479), (127, 172593), (151, 145161), (381, 57531), (453, 48387), (1143, 19177), (1359, 16129)]