643796

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1$

素因数の和:263

約数の個数: 24

約数和(自身を含む): 1219680

約数和(自身を除く): 575884

約数列:

[1, 2, 4, 19, 38, 43, 76, 86, 172, 197, 394, 788, 817, 1634, 3268, 3743, 7486, 8471, 14972, 16942, 33884, 160949, 321898, 643796]

約数ペア:

[(1, 643796), (2, 321898), (4, 160949), (19, 33884), (38, 16942), (43, 14972), (76, 8471), (86, 7486), (172, 3743), (197, 3268), (394, 1634), (788, 817)]