21085029

素因数分解:

$3^4\times 7^1\times {\mathrm{41}}^1\times {\mathrm{907}}^1$

素因数の和:967

約数の個数: 40

約数和(自身を含む): 36915648

約数和(自身を除く): 15830619

約数列:

[1, 3, 7, 9, 21, 27, 41, 63, 81, 123, 189, 287, 369, 567, 861, 907, 1107, 2583, 2721, 3321, 6349, 7749, 8163, 19047, 23247, 24489, 37187, 57141, 73467, 111561, 171423, 260309, 334683, 514269, 780927, 1004049, 2342781, 3012147, 7028343, 21085029]

約数ペア:

[(1, 21085029), (3, 7028343), (7, 3012147), (9, 2342781), (21, 1004049), (27, 780927), (41, 514269), (63, 334683), (81, 260309), (123, 171423), (189, 111561), (287, 73467), (369, 57141), (567, 37187), (861, 24489), (907, 23247), (1107, 19047), (2583, 8163), (2721, 7749), (3321, 6349)]