17720451

素因数分解:

$3^4\times 7^1\times {\mathrm{31253}}^1$

素因数の和:31272

約数の個数: 20

約数和(自身を含む): 30253872

約数和(自身を除く): 12533421

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 31253, 93759, 218771, 281277, 656313, 843831, 1968939, 2531493, 5906817, 17720451]

約数ペア:

[(1, 17720451), (3, 5906817), (7, 2531493), (9, 1968939), (21, 843831), (27, 656313), (63, 281277), (81, 218771), (189, 93759), (567, 31253)]