81212980

素因数分解:

$2^2\times 5^1\times {\mathrm{359}}^1\times {\mathrm{11311}}^1$

素因数の和:11679

約数の個数: 24

約数和(自身を含む): 171037440

約数和(自身を除く): 89824460

約数列:

[1, 2, 4, 5, 10, 20, 359, 718, 1436, 1795, 3590, 7180, 11311, 22622, 45244, 56555, 113110, 226220, 4060649, 8121298, 16242596, 20303245, 40606490, 81212980]

約数ペア:

[(1, 81212980), (2, 40606490), (4, 20303245), (5, 16242596), (10, 8121298), (20, 4060649), (359, 226220), (718, 113110), (1436, 56555), (1795, 45244), (3590, 22622), (7180, 11311)]