21457191

素因数分解:

$3^1\times 7^1\times {\mathrm{491}}^1\times {\mathrm{2081}}^1$

素因数の和:2582

約数の個数: 16

約数和(自身を含む): 32779008

約数和(自身を除く): 11321817

約数列:

[1, 3, 7, 21, 491, 1473, 2081, 3437, 6243, 10311, 14567, 43701, 1021771, 3065313, 7152397, 21457191]

約数ペア:

[(1, 21457191), (3, 7152397), (7, 3065313), (21, 1021771), (491, 43701), (1473, 14567), (2081, 10311), (3437, 6243)]