256880013

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{2377}}^1$

素因数の和:2573

約数の個数: 32

約数和(自身を含む): 393111936

約数和(自身を除く): 136231923

約数列:

[1, 3, 13, 17, 39, 51, 163, 221, 489, 663, 2119, 2377, 2771, 6357, 7131, 8313, 30901, 36023, 40409, 92703, 108069, 121227, 387451, 525317, 1162353, 1575951, 5036863, 6586667, 15110589, 19760001, 85626671, 256880013]

約数ペア:

[(1, 256880013), (3, 85626671), (13, 19760001), (17, 15110589), (39, 6586667), (51, 5036863), (163, 1575951), (221, 1162353), (489, 525317), (663, 387451), (2119, 121227), (2377, 108069), (2771, 92703), (6357, 40409), (7131, 36023), (8313, 30901)]