81580120

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{19801}}^1$

素因数の和:19915

約数の個数: 32

約数和(自身を含む): 185346720

約数和(自身を除く): 103766600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 19801, 39602, 79204, 99005, 158408, 198010, 396020, 792040, 2039503, 4079006, 8158012, 10197515, 16316024, 20395030, 40790060, 81580120]

約数ペア:

[(1, 81580120), (2, 40790060), (4, 20395030), (5, 16316024), (8, 10197515), (10, 8158012), (20, 4079006), (40, 2039503), (103, 792040), (206, 396020), (412, 198010), (515, 158408), (824, 99005), (1030, 79204), (2060, 39602), (4120, 19801)]