21407991

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{9137}}^1$

素因数の和:9222

約数の個数: 16

約数和(自身を含む): 31580928

約数和(自身を除く): 10172937

約数列:

[1, 3, 11, 33, 71, 213, 781, 2343, 9137, 27411, 100507, 301521, 648727, 1946181, 7135997, 21407991]

約数ペア:

[(1, 21407991), (3, 7135997), (11, 1946181), (33, 648727), (71, 301521), (213, 100507), (781, 27411), (2343, 9137)]