208028079

素因数分解:

$3^2\times 7^2\times {\mathrm{471719}}^1$

素因数の和:471739

約数の個数: 18

約数和(自身を含む): 349544520

約数和(自身を除く): 141516441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 471719, 1415157, 3302033, 4245471, 9906099, 23114231, 29718297, 69342693, 208028079]

約数ペア:

[(1, 208028079), (3, 69342693), (7, 29718297), (9, 23114231), (21, 9906099), (49, 4245471), (63, 3302033), (147, 1415157), (441, 471719)]