20461581

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{10477}}^1$

素因数の和:10521

約数の個数: 24

約数和(自身を含む): 34870784

約数和(自身を除く): 14409203

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953, 10477, 31431, 73339, 94293, 220017, 324787, 660051, 974361, 2273509, 2923083, 6820527, 20461581]

約数ペア:

[(1, 20461581), (3, 6820527), (7, 2923083), (9, 2273509), (21, 974361), (31, 660051), (63, 324787), (93, 220017), (217, 94293), (279, 73339), (651, 31431), (1953, 10477)]