208028961

素因数分解:

$3^2\times 7^2\times {\mathrm{471721}}^1$

素因数の和:471741

約数の個数: 18

約数和(自身を含む): 349546002

約数和(自身を除く): 141517041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 471721, 1415163, 3302047, 4245489, 9906141, 23114329, 29718423, 69342987, 208028961]

約数ペア:

[(1, 208028961), (3, 69342987), (7, 29718423), (9, 23114329), (21, 9906141), (49, 4245489), (63, 3302047), (147, 1415163), (441, 471721)]