21357441

素因数分解:

$3^2\times 7^1\times {\mathrm{263}}^1\times {\mathrm{1289}}^1$

素因数の和:1565

約数の個数: 24

約数和(自身を含む): 35418240

約数和(自身を除く): 14060799

約数列:

[1, 3, 7, 9, 21, 63, 263, 789, 1289, 1841, 2367, 3867, 5523, 9023, 11601, 16569, 27069, 81207, 339007, 1017021, 2373049, 3051063, 7119147, 21357441]

約数ペア:

[(1, 21357441), (3, 7119147), (7, 3051063), (9, 2373049), (21, 1017021), (63, 339007), (263, 81207), (789, 27069), (1289, 16569), (1841, 11601), (2367, 9023), (3867, 5523)]