19983951

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{1567}}^1$

素因数の和:1695

約数の個数: 24

約数和(自身を含む): 31391360

約数和(自身を除く): 11407409

約数列:

[1, 3, 9, 13, 39, 109, 117, 327, 981, 1417, 1567, 4251, 4701, 12753, 14103, 20371, 61113, 170803, 183339, 512409, 1537227, 2220439, 6661317, 19983951]

約数ペア:

[(1, 19983951), (3, 6661317), (9, 2220439), (13, 1537227), (39, 512409), (109, 183339), (117, 170803), (327, 61113), (981, 20371), (1417, 14103), (1567, 12753), (4251, 4701)]