21080216

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{90863}}^1$

素因数の和:90898

約数の個数: 16

約数和(自身を含む): 40888800

約数和(自身を除く): 19808584

約数列:

[1, 2, 4, 8, 29, 58, 116, 232, 90863, 181726, 363452, 726904, 2635027, 5270054, 10540108, 21080216]

約数ペア:

[(1, 21080216), (2, 10540108), (4, 5270054), (8, 2635027), (29, 726904), (58, 363452), (116, 181726), (232, 90863)]