20121.000000

素因数分解:

$2^1\times 3^2\times {\mathrm{19}}^1\times {\mathrm{2657}}^1$

素因数の和:2684

約数の個数: 24

約数和(自身を含む): 2073240

約数和(自身を除く): 1164546

約数列:

[1, 2, 3, 6, 9, 18, 19, 38, 57, 114, 171, 342, 2657, 5314, 7971, 15942, 23913, 47826, 50483, 100966, 151449, 302898, 454347, 908694]

約数ペア:

[(1, 908694), (2, 454347), (3, 302898), (6, 151449), (9, 100966), (18, 50483), (19, 47826), (38, 23913), (57, 15942), (114, 7971), (171, 5314), (342, 2657)]