20917491

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{21193}}^1$

素因数の和:21250

約数の個数: 16

約数和(自身を含む): 32553984

約数和(自身を除く): 11636493

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 21193, 63579, 148351, 445053, 996071, 2988213, 6972497, 20917491]

約数ペア:

[(1, 20917491), (3, 6972497), (7, 2988213), (21, 996071), (47, 445053), (141, 148351), (329, 63579), (987, 21193)]