81009520

素因数分解:

$2^4\times 5^1\times {\mathrm{1012619}}^1$

素因数の和:1012632

約数の個数: 20

約数和(自身を含む): 188347320

約数和(自身を除く): 107337800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1012619, 2025238, 4050476, 5063095, 8100952, 10126190, 16201904, 20252380, 40504760, 81009520]

約数ペア:

[(1, 81009520), (2, 40504760), (4, 20252380), (5, 16201904), (8, 10126190), (10, 8100952), (16, 5063095), (20, 4050476), (40, 2025238), (80, 1012619)]