21940413

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 33702912

約数和(自身を除く): 11762499

約数列:

[1, 3, 11, 23, 33, 69, 137, 211, 253, 411, 633, 759, 1507, 2321, 3151, 4521, 4853, 6963, 9453, 14559, 28907, 34661, 53383, 86721, 103983, 160149, 317977, 664861, 953931, 1994583, 7313471, 21940413]

約数ペア:

[(1, 21940413), (3, 7313471), (11, 1994583), (23, 953931), (33, 664861), (69, 317977), (137, 160149), (211, 103983), (253, 86721), (411, 53383), (633, 34661), (759, 28907), (1507, 14559), (2321, 9453), (3151, 6963), (4521, 4853)]