21205159

素因数分解:

${\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1\times {\mathrm{167}}^1$

素因数の和:390

約数の個数: 16

約数和(自身を含む): 23143680

約数和(自身を除く): 1938521

約数列:

[1, 19, 41, 163, 167, 779, 3097, 3173, 6683, 6847, 27221, 126977, 130093, 517199, 1116061, 21205159]

約数ペア:

[(1, 21205159), (19, 1116061), (41, 517199), (163, 130093), (167, 126977), (779, 27221), (3097, 6847), (3173, 6683)]