21657986

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{81421}}^1$

素因数の和:81449

約数の個数: 16

約数和(自身を含む): 39082560

約数和(自身を除く): 17424574

約数列:

[1, 2, 7, 14, 19, 38, 133, 266, 81421, 162842, 569947, 1139894, 1546999, 3093998, 10828993, 21657986]

約数ペア:

[(1, 21657986), (2, 10828993), (7, 3093998), (14, 1546999), (19, 1139894), (38, 569947), (133, 162842), (266, 81421)]