21777620

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{10781}}^1$

素因数の和:10891

約数の個数: 24

約数和(自身を含む): 46190088

約数和(自身を除く): 24412468

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 10781, 21562, 43124, 53905, 107810, 215620, 1088881, 2177762, 4355524, 5444405, 10888810, 21777620]

約数ペア:

[(1, 21777620), (2, 10888810), (4, 5444405), (5, 4355524), (10, 2177762), (20, 1088881), (101, 215620), (202, 107810), (404, 53905), (505, 43124), (1010, 21562), (2020, 10781)]