20818775

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1069}}^1$

素因数の和:1139

約数の個数: 24

約数和(自身を含む): 27862800

約数和(自身を除く): 7044025

約数列:

[1, 5, 19, 25, 41, 95, 205, 475, 779, 1025, 1069, 3895, 5345, 19475, 20311, 26725, 43829, 101555, 219145, 507775, 832751, 1095725, 4163755, 20818775]

約数ペア:

[(1, 20818775), (5, 4163755), (19, 1095725), (25, 832751), (41, 507775), (95, 219145), (205, 101555), (475, 43829), (779, 26725), (1025, 20311), (1069, 19475), (3895, 5345)]