81433840

素因数分解:

$2^4\times 5^1\times {\mathrm{1017923}}^1$

素因数の和:1017936

約数の個数: 20

約数和(自身を含む): 189333864

約数和(自身を除く): 107900024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1017923, 2035846, 4071692, 5089615, 8143384, 10179230, 16286768, 20358460, 40716920, 81433840]

約数ペア:

[(1, 81433840), (2, 40716920), (4, 20358460), (5, 16286768), (8, 10179230), (10, 8143384), (16, 5089615), (20, 4071692), (40, 2035846), (80, 1017923)]