21023667

素因数分解:

$3^2\times 7^1\times {\mathrm{307}}^1\times {\mathrm{1087}}^1$

素因数の和:1407

約数の個数: 24

約数和(自身を含む): 34850816

約数和(自身を除く): 13827149

約数列:

[1, 3, 7, 9, 21, 63, 307, 921, 1087, 2149, 2763, 3261, 6447, 7609, 9783, 19341, 22827, 68481, 333709, 1001127, 2335963, 3003381, 7007889, 21023667]

約数ペア:

[(1, 21023667), (3, 7007889), (7, 3003381), (9, 2335963), (21, 1001127), (63, 333709), (307, 68481), (921, 22827), (1087, 19341), (2149, 9783), (2763, 7609), (3261, 6447)]