21280791

素因数分解:

$3^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{6217}}^1$

素因数の和:6390

約数の個数: 16

約数和(自身を含む): 32632064

約数和(自身を除く): 11351273

約数列:

[1, 3, 7, 21, 163, 489, 1141, 3423, 6217, 18651, 43519, 130557, 1013371, 3040113, 7093597, 21280791]

約数ペア:

[(1, 21280791), (3, 7093597), (7, 3040113), (21, 1013371), (163, 130557), (489, 43519), (1141, 18651), (3423, 6217)]