21081728

素因数分解:

$2^7\times {\mathrm{164701}}^1$

素因数の和:164715

約数の個数: 16

約数和(自身を含む): 41999010

約数和(自身を除く): 20917282

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 164701, 329402, 658804, 1317608, 2635216, 5270432, 10540864, 21081728]

約数ペア:

[(1, 21081728), (2, 10540864), (4, 5270432), (8, 2635216), (16, 1317608), (32, 658804), (64, 329402), (128, 164701)]