21919315

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{2909}}^1$

素因数の和:3062

約数の個数: 16

約数和(自身を含む): 28913760

約数和(自身を除く): 6994445

約数列:

[1, 5, 11, 55, 137, 685, 1507, 2909, 7535, 14545, 31999, 159995, 398533, 1992665, 4383863, 21919315]

約数ペア:

[(1, 21919315), (5, 4383863), (11, 1992665), (55, 398533), (137, 159995), (685, 31999), (1507, 14545), (2909, 7535)]