21680216

素因数分解:

$2^3\times {\mathrm{19}}^2\times {\mathrm{7507}}^1$

素因数の和:7551

約数の個数: 24

約数和(自身を含む): 42908220

約数和(自身を除く): 21228004

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 361, 722, 1444, 2888, 7507, 15014, 30028, 60056, 142633, 285266, 570532, 1141064, 2710027, 5420054, 10840108, 21680216]

約数ペア:

[(1, 21680216), (2, 10840108), (4, 5420054), (8, 2710027), (19, 1141064), (38, 570532), (76, 285266), (152, 142633), (361, 60056), (722, 30028), (1444, 15014), (2888, 7507)]