21291426

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{90989}}^1$

素因数の和:91010

約数の個数: 24

約数和(自身を含む): 49680540

約数和(自身を除く): 28389114

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 234, 90989, 181978, 272967, 545934, 818901, 1182857, 1637802, 2365714, 3548571, 7097142, 10645713, 21291426]

約数ペア:

[(1, 21291426), (2, 10645713), (3, 7097142), (6, 3548571), (9, 2365714), (13, 1637802), (18, 1182857), (26, 818901), (39, 545934), (78, 272967), (117, 181978), (234, 90989)]