21239061

素因数分解:

$3^1\times {\mathrm{31}}^2\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:257

約数の個数: 24

約数和(自身を含む): 30028320

約数和(自身を除く): 8789259

約数列:

[1, 3, 31, 53, 93, 139, 159, 417, 961, 1643, 2883, 4309, 4929, 7367, 12927, 22101, 50933, 133579, 152799, 228377, 400737, 685131, 7079687, 21239061]

約数ペア:

[(1, 21239061), (3, 7079687), (31, 685131), (53, 400737), (93, 228377), (139, 152799), (159, 133579), (417, 50933), (961, 22101), (1643, 12927), (2883, 7367), (4309, 4929)]