81355760

素因数分解:

$2^4\times 5^1\times {\mathrm{1016947}}^1$

素因数の和:1016960

約数の個数: 20

約数和(自身を含む): 189152328

約数和(自身を除く): 107796568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1016947, 2033894, 4067788, 5084735, 8135576, 10169470, 16271152, 20338940, 40677880, 81355760]

約数ペア:

[(1, 81355760), (2, 40677880), (4, 20338940), (5, 16271152), (8, 10169470), (10, 8135576), (16, 5084735), (20, 4067788), (40, 2033894), (80, 1016947)]