21081440

素因数分解:

$2^5\times 5^1\times {\mathrm{131759}}^1$

素因数の和:131774

約数の個数: 24

約数和(自身を含む): 49805280

約数和(自身を除く): 28723840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 131759, 263518, 527036, 658795, 1054072, 1317590, 2108144, 2635180, 4216288, 5270360, 10540720, 21081440]

約数ペア:

[(1, 21081440), (2, 10540720), (4, 5270360), (5, 4216288), (8, 2635180), (10, 2108144), (16, 1317590), (20, 1054072), (32, 658795), (40, 527036), (80, 263518), (160, 131759)]