20321609

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^2\times {\mathrm{157}}^1$

素因数の和:257

約数の個数: 24

約数和(自身を含む): 26134464

約数和(自身を除く): 5812855

約数列:

[1, 7, 11, 41, 77, 157, 287, 451, 1099, 1681, 1727, 3157, 6437, 11767, 12089, 18491, 45059, 70807, 129437, 263917, 495649, 1847419, 2903087, 20321609]

約数ペア:

[(1, 20321609), (7, 2903087), (11, 1847419), (41, 495649), (77, 263917), (157, 129437), (287, 70807), (451, 45059), (1099, 18491), (1681, 12089), (1727, 11767), (3157, 6437)]