18881947

素因数分解:

$7^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1\times {\mathrm{349}}^1$

素因数の和:546

約数の個数: 16

約数和(自身を含む): 22176000

約数和(自身を除く): 3294053

約数列:

[1, 7, 59, 131, 349, 413, 917, 2443, 7729, 20591, 45719, 54103, 144137, 320033, 2697421, 18881947]

約数ペア:

[(1, 18881947), (7, 2697421), (59, 320033), (131, 144137), (349, 54103), (413, 45719), (917, 20591), (2443, 7729)]