81234520

素因数分解:

$2^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{5657}}^1$

素因数の和:6027

約数の個数: 32

約数和(自身を含む): 183319200

約数和(自身を除く): 102084680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 359, 718, 1436, 1795, 2872, 3590, 5657, 7180, 11314, 14360, 22628, 28285, 45256, 56570, 113140, 226280, 2030863, 4061726, 8123452, 10154315, 16246904, 20308630, 40617260, 81234520]

約数ペア:

[(1, 81234520), (2, 40617260), (4, 20308630), (5, 16246904), (8, 10154315), (10, 8123452), (20, 4061726), (40, 2030863), (359, 226280), (718, 113140), (1436, 56570), (1795, 45256), (2872, 28285), (3590, 22628), (5657, 14360), (7180, 11314)]