20521406

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{661}}^1$

素因数の和:744

約数の個数: 24

約数和(自身を含む): 33293304

約数和(自身を除く): 12771898

約数列:

[1, 2, 19, 38, 43, 86, 361, 661, 722, 817, 1322, 1634, 12559, 15523, 25118, 28423, 31046, 56846, 238621, 477242, 540037, 1080074, 10260703, 20521406]

約数ペア:

[(1, 20521406), (2, 10260703), (19, 1080074), (38, 540037), (43, 477242), (86, 238621), (361, 56846), (661, 31046), (722, 28423), (817, 25118), (1322, 15523), (1634, 12559)]