20401353

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4561}}^1$

素因数の和:4645

約数の個数: 24

約数和(自身を含む): 34160256

約数和(自身を除く): 13758903

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4561, 13683, 31927, 41049, 95781, 287343, 323831, 971493, 2266817, 2914479, 6800451, 20401353]

約数ペア:

[(1, 20401353), (3, 6800451), (7, 2914479), (9, 2266817), (21, 971493), (63, 323831), (71, 287343), (213, 95781), (497, 41049), (639, 31927), (1491, 13683), (4473, 4561)]