28109420

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{6661}}^1$

素因数の和:6881

約数の個数: 24

約数和(自身を含む): 59318448

約数和(自身を除く): 31209028

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 6661, 13322, 26644, 33305, 66610, 133220, 1405471, 2810942, 5621884, 7027355, 14054710, 28109420]

約数ペア:

[(1, 28109420), (2, 14054710), (4, 7027355), (5, 5621884), (10, 2810942), (20, 1405471), (211, 133220), (422, 66610), (844, 33305), (1055, 26644), (2110, 13322), (4220, 6661)]