81307280

素因数分解:

$2^4\times 5^1\times {\mathrm{1016341}}^1$

素因数の和:1016354

約数の個数: 20

約数和(自身を含む): 189039612

約数和(自身を除く): 107732332

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1016341, 2032682, 4065364, 5081705, 8130728, 10163410, 16261456, 20326820, 40653640, 81307280]

約数ペア:

[(1, 81307280), (2, 40653640), (4, 20326820), (5, 16261456), (8, 10163410), (10, 8130728), (16, 5081705), (20, 4065364), (40, 2032682), (80, 1016341)]