21442355

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1$

素因数の和:140

約数の個数: 48

約数和(自身を含む): 31829760

約数和(自身を除く): 10387405

約数列:

[1, 5, 11, 17, 19, 55, 71, 85, 95, 187, 209, 289, 323, 355, 781, 935, 1045, 1207, 1349, 1445, 1615, 3179, 3553, 3905, 5491, 6035, 6745, 13277, 14839, 15895, 17765, 20519, 22933, 27455, 60401, 66385, 74195, 102595, 114665, 225709, 252263, 302005, 389861, 1128545, 1261315, 1949305, 4288471, 21442355]

約数ペア:

[(1, 21442355), (5, 4288471), (11, 1949305), (17, 1261315), (19, 1128545), (55, 389861), (71, 302005), (85, 252263), (95, 225709), (187, 114665), (209, 102595), (289, 74195), (323, 66385), (355, 60401), (781, 27455), (935, 22933), (1045, 20519), (1207, 17765), (1349, 15895), (1445, 14839), (1615, 13277), (3179, 6745), (3553, 6035), (3905, 5491)]