19720827

素因数分解:

$3^4\times 7^1\times {\mathrm{34781}}^1$

素因数の和:34800

約数の個数: 20

約数和(自身を含む): 33668976

約数和(自身を除く): 13948149

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 34781, 104343, 243467, 313029, 730401, 939087, 2191203, 2817261, 6573609, 19720827]

約数ペア:

[(1, 19720827), (3, 6573609), (7, 2817261), (9, 2191203), (21, 939087), (27, 730401), (63, 313029), (81, 243467), (189, 104343), (567, 34781)]