21338493

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{3967}}^1$

素因数の和:4144

約数の個数: 16

約数和(自身を含む): 31236096

約数和(自身を除く): 9897603

約数列:

[1, 3, 11, 33, 163, 489, 1793, 3967, 5379, 11901, 43637, 130911, 646621, 1939863, 7112831, 21338493]

約数ペア:

[(1, 21338493), (3, 7112831), (11, 1939863), (33, 646621), (163, 130911), (489, 43637), (1793, 11901), (3967, 5379)]