21140483

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12227}}^1$

素因数の和:12266

約数の個数: 16

約数和(自身を含む): 27390720

約数和(自身を除く): 6250237

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12227, 85589, 158951, 232313, 1112657, 1626191, 3020069, 21140483]

約数ペア:

[(1, 21140483), (7, 3020069), (13, 1626191), (19, 1112657), (91, 232313), (133, 158951), (247, 85589), (1729, 12227)]