21630721

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1579}}^1$

素因数の和:1708

約数の個数: 16

約数和(自身を含む): 26291200

約数和(自身を除く): 4660479

約数列:

[1, 7, 19, 103, 133, 721, 1579, 1957, 11053, 13699, 30001, 162637, 210007, 1138459, 3090103, 21630721]

約数ペア:

[(1, 21630721), (7, 3090103), (19, 1138459), (103, 210007), (133, 162637), (721, 30001), (1579, 13699), (1957, 11053)]