19972771

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1579}}^1$

素因数の和:1738

約数の個数: 16

約数和(自身を含む): 24774400

約数和(自身を除く): 4801629

約数列:

[1, 7, 13, 91, 139, 973, 1579, 1807, 11053, 12649, 20527, 143689, 219481, 1536367, 2853253, 19972771]

約数ペア:

[(1, 19972771), (7, 2853253), (13, 1536367), (91, 219481), (139, 143689), (973, 20527), (1579, 12649), (1807, 11053)]