21781070

素因数分解:

$2^1\times 5^1\times {\mathrm{317}}^1\times {\mathrm{6871}}^1$

素因数の和:7195

約数の個数: 16

約数和(自身を含む): 39335328

約数和(自身を除く): 17554258

約数列:

[1, 2, 5, 10, 317, 634, 1585, 3170, 6871, 13742, 34355, 68710, 2178107, 4356214, 10890535, 21781070]

約数ペア:

[(1, 21781070), (2, 10890535), (5, 4356214), (10, 2178107), (317, 68710), (634, 34355), (1585, 13742), (3170, 6871)]