21928221

素因数分解:

$3^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{2657}}^1$

素因数の和:2801

約数の個数: 24

約数和(自身を含む): 36489024

約数和(自身を除く): 14560803

約数列:

[1, 3, 7, 9, 21, 63, 131, 393, 917, 1179, 2657, 2751, 7971, 8253, 18599, 23913, 55797, 167391, 348067, 1044201, 2436469, 3132603, 7309407, 21928221]

約数ペア:

[(1, 21928221), (3, 7309407), (7, 3132603), (9, 2436469), (21, 1044201), (63, 348067), (131, 167391), (393, 55797), (917, 23913), (1179, 18599), (2657, 8253), (2751, 7971)]