21507031

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1777}}^1$

素因数の和:1823

約数の個数: 24

約数和(自身を含む): 28376880

約数和(自身を除く): 6869849

約数列:

[1, 7, 13, 19, 49, 91, 133, 247, 637, 931, 1729, 1777, 12103, 12439, 23101, 33763, 87073, 161707, 236341, 438919, 1131949, 1654387, 3072433, 21507031]

約数ペア:

[(1, 21507031), (7, 3072433), (13, 1654387), (19, 1131949), (49, 438919), (91, 236341), (133, 161707), (247, 87073), (637, 33763), (931, 23101), (1729, 12439), (1777, 12103)]