21747843

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{269}}^1\times {\mathrm{691}}^1$

素因数の和:979

約数の個数: 24

約数和(自身を含む): 34004880

約数和(自身を除く): 12257037

約数列:

[1, 3, 9, 13, 39, 117, 269, 691, 807, 2073, 2421, 3497, 6219, 8983, 10491, 26949, 31473, 80847, 185879, 557637, 1672911, 2416427, 7249281, 21747843]

約数ペア:

[(1, 21747843), (3, 7249281), (9, 2416427), (13, 1672911), (39, 557637), (117, 185879), (269, 80847), (691, 31473), (807, 26949), (2073, 10491), (2421, 8983), (3497, 6219)]