21228155

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19211}}^1$

素因数の和:19246

約数の個数: 16

約数和(自身を含む): 29048544

約数和(自身を除く): 7820389

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19211, 96055, 249743, 326587, 1248715, 1632935, 4245631, 21228155]

約数ペア:

[(1, 21228155), (5, 4245631), (13, 1632935), (17, 1248715), (65, 326587), (85, 249743), (221, 96055), (1105, 19211)]