21281689

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{3461}}^1$

素因数の和:3528

約数の個数: 16

約数和(自身を含む): 25591104

約数和(自身を除く): 4309415

約数列:

[1, 11, 13, 43, 143, 473, 559, 3461, 6149, 38071, 44993, 148823, 494923, 1637053, 1934699, 21281689]

約数ペア:

[(1, 21281689), (11, 1934699), (13, 1637053), (43, 494923), (143, 148823), (473, 44993), (559, 38071), (3461, 6149)]