81355790

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{91411}}^1$

素因数の和:91507

約数の個数: 16

約数和(自身を含む): 148087440

約数和(自身を除く): 66731650

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 91411, 182822, 457055, 914110, 8135579, 16271158, 40677895, 81355790]

約数ペア:

[(1, 81355790), (2, 40677895), (5, 16271158), (10, 8135579), (89, 914110), (178, 457055), (445, 182822), (890, 91411)]