21195167

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{2801}}^1$

素因数の和:2878

約数の個数: 16

約数和(自身を含む): 25823232

約数和(自身を除く): 4628065

約数列:

[1, 7, 23, 47, 161, 329, 1081, 2801, 7567, 19607, 64423, 131647, 450961, 921529, 3027881, 21195167]

約数ペア:

[(1, 21195167), (7, 3027881), (23, 921529), (47, 450961), (161, 131647), (329, 64423), (1081, 19607), (2801, 7567)]