20656979

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{6911}}^1$

素因数の和:6986

約数の個数: 12

約数和(自身を含む): 24427008

約数和(自身を除く): 3770029

約数列:

[1, 7, 49, 61, 427, 2989, 6911, 48377, 338639, 421571, 2950997, 20656979]

約数ペア:

[(1, 20656979), (7, 2950997), (49, 421571), (61, 338639), (427, 48377), (2989, 6911)]