21682671

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{53}}^2\times {\mathrm{83}}^1$

素因数の和:223

約数の個数: 24

約数和(自身を含む): 30782976

約数和(自身を除く): 9100305

約数列:

[1, 3, 31, 53, 83, 93, 159, 249, 1643, 2573, 2809, 4399, 4929, 7719, 8427, 13197, 87079, 136369, 233147, 261237, 409107, 699441, 7227557, 21682671]

約数ペア:

[(1, 21682671), (3, 7227557), (31, 699441), (53, 409107), (83, 261237), (93, 233147), (159, 136369), (249, 87079), (1643, 13197), (2573, 8427), (2809, 7719), (4399, 4929)]