21381776

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102797}}^1$

素因数の和:102818

約数の個数: 20

約数和(自身を含む): 44614332

約数和(自身を除く): 23232556

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102797, 205594, 411188, 822376, 1336361, 1644752, 2672722, 5345444, 10690888, 21381776]

約数ペア:

[(1, 21381776), (2, 10690888), (4, 5345444), (8, 2672722), (13, 1644752), (16, 1336361), (26, 822376), (52, 411188), (104, 205594), (208, 102797)]