21927285

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6863}}^1$

素因数の和:6945

約数の個数: 24

約数和(自身を含む): 38548224

約数和(自身を除く): 16620939

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6863, 20589, 34315, 61767, 102945, 308835, 487273, 1461819, 2436365, 4385457, 7309095, 21927285]

約数ペア:

[(1, 21927285), (3, 7309095), (5, 4385457), (9, 2436365), (15, 1461819), (45, 487273), (71, 308835), (213, 102945), (355, 61767), (639, 34315), (1065, 20589), (3195, 6863)]