21251406

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{321991}}^1$

素因数の和:322007

約数の個数: 16

約数和(自身を含む): 46366848

約数和(自身を除く): 25115442

約数列:

[1, 2, 3, 6, 11, 22, 33, 66, 321991, 643982, 965973, 1931946, 3541901, 7083802, 10625703, 21251406]

約数ペア:

[(1, 21251406), (2, 10625703), (3, 7083802), (6, 3541901), (11, 1931946), (22, 965973), (33, 643982), (66, 321991)]