21037709

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1697}}^1$

素因数の和:1745

約数の個数: 24

約数和(自身を含む): 27874368

約数和(自身を除く): 6836659

約数列:

[1, 7, 11, 23, 49, 77, 161, 253, 539, 1127, 1697, 1771, 11879, 12397, 18667, 39031, 83153, 130669, 273217, 429341, 914683, 1912519, 3005387, 21037709]

約数ペア:

[(1, 21037709), (7, 3005387), (11, 1912519), (23, 914683), (49, 429341), (77, 273217), (161, 130669), (253, 83153), (539, 39031), (1127, 18667), (1697, 12397), (1771, 11879)]