90019985

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{7757}}^1$

素因数の和:7984

約数の個数: 16

約数和(自身を含む): 118418112

約数和(自身を除く): 28398127

約数列:

[1, 5, 11, 55, 211, 1055, 2321, 7757, 11605, 38785, 85327, 426635, 1636727, 8183635, 18003997, 90019985]

約数ペア:

[(1, 90019985), (5, 18003997), (11, 8183635), (55, 1636727), (211, 426635), (1055, 85327), (2321, 38785), (7757, 11605)]