19995905

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{947}}^1$

素因数の和:1096

約数の個数: 16

約数和(自身を含む): 24845184

約数和(自身を除く): 4849279

約数列:

[1, 5, 41, 103, 205, 515, 947, 4223, 4735, 21115, 38827, 97541, 194135, 487705, 3999181, 19995905]

約数ペア:

[(1, 19995905), (5, 3999181), (41, 487705), (103, 194135), (205, 97541), (515, 38827), (947, 21115), (4223, 4735)]