19904697

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{7927}}^1$

素因数の和:7970

約数の個数: 20

約数和(自身を含む): 30697216

約数和(自身を除く): 10792519

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 7927, 23781, 71343, 214029, 245737, 642087, 737211, 2211633, 6634899, 19904697]

約数ペア:

[(1, 19904697), (3, 6634899), (9, 2211633), (27, 737211), (31, 642087), (81, 245737), (93, 214029), (279, 71343), (837, 23781), (2511, 7927)]