20728449

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17317}}^1$

素因数の和:17349

約数の個数: 24

約数和(自身を含む): 36021440

約数和(自身を除く): 15292991

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17317, 51951, 121219, 155853, 329023, 363657, 987069, 1090971, 2303161, 2961207, 6909483, 20728449]

約数ペア:

[(1, 20728449), (3, 6909483), (7, 2961207), (9, 2303161), (19, 1090971), (21, 987069), (57, 363657), (63, 329023), (133, 155853), (171, 121219), (399, 51951), (1197, 17317)]