20918511

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{191}}^1\times {\mathrm{283}}^1$

素因数の和:523

約数の個数: 24

約数和(自身を含む): 31190016

約数和(自身を除く): 10271505

約数列:

[1, 3, 9, 43, 129, 191, 283, 387, 573, 849, 1719, 2547, 8213, 12169, 24639, 36507, 54053, 73917, 109521, 162159, 486477, 2324279, 6972837, 20918511]

約数ペア:

[(1, 20918511), (3, 6972837), (9, 2324279), (43, 486477), (129, 162159), (191, 109521), (283, 73917), (387, 54053), (573, 36507), (849, 24639), (1719, 12169), (2547, 8213)]