21073221

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{191}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 35223552

約数和(自身を除く): 14150331

約数列:

[1, 3, 9, 13, 23, 39, 41, 69, 117, 123, 191, 207, 299, 369, 533, 573, 897, 943, 1599, 1719, 2483, 2691, 2829, 4393, 4797, 7449, 7831, 8487, 12259, 13179, 22347, 23493, 36777, 39537, 57109, 70479, 101803, 110331, 171327, 180113, 305409, 513981, 540339, 916227, 1621017, 2341469, 7024407, 21073221]

約数ペア:

[(1, 21073221), (3, 7024407), (9, 2341469), (13, 1621017), (23, 916227), (39, 540339), (41, 513981), (69, 305409), (117, 180113), (123, 171327), (191, 110331), (207, 101803), (299, 70479), (369, 57109), (533, 39537), (573, 36777), (897, 23493), (943, 22347), (1599, 13179), (1719, 12259), (2483, 8487), (2691, 7831), (2829, 7449), (4393, 4797)]