20661249

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{127}}^2$

素因数の和:325

約数の個数: 24

約数和(自身を含む): 32253888

約数和(自身を除く): 11592639

約数列:

[1, 3, 7, 21, 61, 127, 183, 381, 427, 889, 1281, 2667, 7747, 16129, 23241, 48387, 54229, 112903, 162687, 338709, 983869, 2951607, 6887083, 20661249]

約数ペア:

[(1, 20661249), (3, 6887083), (7, 2951607), (21, 983869), (61, 338709), (127, 162687), (183, 112903), (381, 54229), (427, 48387), (889, 23241), (1281, 16129), (2667, 7747)]