21758385

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{7757}}^1$

素因数の和:7793

約数の個数: 32

約数和(自身を含む): 40217472

約数和(自身を除く): 18459087

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805, 7757, 23271, 38785, 85327, 116355, 131869, 255981, 395607, 426635, 659345, 1279905, 1450559, 1978035, 4351677, 7252795, 21758385]

約数ペア:

[(1, 21758385), (3, 7252795), (5, 4351677), (11, 1978035), (15, 1450559), (17, 1279905), (33, 659345), (51, 426635), (55, 395607), (85, 255981), (165, 131869), (187, 116355), (255, 85327), (561, 38785), (935, 23271), (2805, 7757)]