21986778

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{2543}}^1$

素因数の和:2690

約数の個数: 32

約数和(自身を含む): 48356352

約数和(自身を除く): 26369574

約数列:

[1, 2, 3, 6, 11, 22, 33, 66, 131, 262, 393, 786, 1441, 2543, 2882, 4323, 5086, 7629, 8646, 15258, 27973, 55946, 83919, 167838, 333133, 666266, 999399, 1998798, 3664463, 7328926, 10993389, 21986778]

約数ペア:

[(1, 21986778), (2, 10993389), (3, 7328926), (6, 3664463), (11, 1998798), (22, 999399), (33, 666266), (66, 333133), (131, 167838), (262, 83919), (393, 55946), (786, 27973), (1441, 15258), (2543, 8646), (2882, 7629), (4323, 5086)]