21075855

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^2\times {\mathrm{313}}^1$

素因数の和:455

約数の個数: 24

約数和(自身を含む): 34341552

約数和(自身を除く): 13265697

約数列:

[1, 3, 5, 15, 67, 201, 313, 335, 939, 1005, 1565, 4489, 4695, 13467, 20971, 22445, 62913, 67335, 104855, 314565, 1405057, 4215171, 7025285, 21075855]

約数ペア:

[(1, 21075855), (3, 7025285), (5, 4215171), (15, 1405057), (67, 314565), (201, 104855), (313, 67335), (335, 62913), (939, 22445), (1005, 20971), (1565, 13467), (4489, 4695)]