20640268

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{6607}}^1$

素因数の和:6693

約数の個数: 24

約数和(自身を含む): 39965184

約数和(自身を除く): 19324916

約数列:

[1, 2, 4, 11, 22, 44, 71, 142, 284, 781, 1562, 3124, 6607, 13214, 26428, 72677, 145354, 290708, 469097, 938194, 1876388, 5160067, 10320134, 20640268]

約数ペア:

[(1, 20640268), (2, 10320134), (4, 5160067), (11, 1876388), (22, 938194), (44, 469097), (71, 290708), (142, 145354), (284, 72677), (781, 26428), (1562, 13214), (3124, 6607)]