81307120

素因数分解:

$2^4\times 5^1\times {\mathrm{1016339}}^1$

素因数の和:1016352

約数の個数: 20

約数和(自身を含む): 189039240

約数和(自身を除く): 107732120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1016339, 2032678, 4065356, 5081695, 8130712, 10163390, 16261424, 20326780, 40653560, 81307120]

約数ペア:

[(1, 81307120), (2, 40653560), (4, 20326780), (5, 16261424), (8, 10163390), (10, 8130712), (16, 5081695), (20, 4065356), (40, 2032678), (80, 1016339)]