21695378

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{151}}^1\times {\mathrm{199}}^1$

素因数の和:390

約数の個数: 24

約数和(自身を含む): 34747200

約数和(自身を除く): 13051822

約数列:

[1, 2, 19, 38, 151, 199, 302, 361, 398, 722, 2869, 3781, 5738, 7562, 30049, 54511, 60098, 71839, 109022, 143678, 570931, 1141862, 10847689, 21695378]

約数ペア:

[(1, 21695378), (2, 10847689), (19, 1141862), (38, 570931), (151, 143678), (199, 109022), (302, 71839), (361, 60098), (398, 54511), (722, 30049), (2869, 7562), (3781, 5738)]