21787131

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1\times {\mathrm{439}}^1$

素因数の和:746

約数の個数: 16

約数和(自身を含む): 29652480

約数和(自身を除く): 7865349

約数列:

[1, 3, 71, 213, 233, 439, 699, 1317, 16543, 31169, 49629, 93507, 102287, 306861, 7262377, 21787131]

約数ペア:

[(1, 21787131), (3, 7262377), (71, 306861), (213, 102287), (233, 93507), (439, 49629), (699, 31169), (1317, 16543)]