21298085

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{313}}^1\times {\mathrm{439}}^1$

素因数の和:788

約数の個数: 16

約数和(自身を含む): 26526720

約数和(自身を除く): 5228635

約数列:

[1, 5, 31, 155, 313, 439, 1565, 2195, 9703, 13609, 48515, 68045, 137407, 687035, 4259617, 21298085]

約数ペア:

[(1, 21298085), (5, 4259617), (31, 687035), (155, 137407), (313, 68045), (439, 48515), (1565, 13609), (2195, 9703)]