20564369

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:365

約数の個数: 24

約数和(自身を含む): 25411968

約数和(自身を除く): 4847599

約数列:

[1, 7, 23, 49, 71, 161, 257, 497, 1127, 1633, 1799, 3479, 5911, 11431, 12593, 18247, 41377, 80017, 127729, 289639, 419681, 894103, 2937767, 20564369]

約数ペア:

[(1, 20564369), (7, 2937767), (23, 894103), (49, 419681), (71, 289639), (161, 127729), (257, 80017), (497, 41377), (1127, 18247), (1633, 12593), (1799, 11431), (3479, 5911)]