19917891

素因数分解:

$3^2\times 7^1\times {\mathrm{409}}^1\times {\mathrm{773}}^1$

素因数の和:1195

約数の個数: 24

約数和(自身を含む): 33003360

約数和(自身を除く): 13085469

約数列:

[1, 3, 7, 9, 21, 63, 409, 773, 1227, 2319, 2863, 3681, 5411, 6957, 8589, 16233, 25767, 48699, 316157, 948471, 2213099, 2845413, 6639297, 19917891]

約数ペア:

[(1, 19917891), (3, 6639297), (7, 2845413), (9, 2213099), (21, 948471), (63, 316157), (409, 48699), (773, 25767), (1227, 16233), (2319, 8589), (2863, 6957), (3681, 5411)]