21791781

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{307}}^1$

素因数の和:566

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 13689819

約数列:

[1, 3, 9, 11, 27, 33, 99, 239, 297, 307, 717, 921, 2151, 2629, 2763, 3377, 6453, 7887, 8289, 10131, 23661, 30393, 70983, 73373, 91179, 220119, 660357, 807103, 1981071, 2421309, 7263927, 21791781]

約数ペア:

[(1, 21791781), (3, 7263927), (9, 2421309), (11, 1981071), (27, 807103), (33, 660357), (99, 220119), (239, 91179), (297, 73373), (307, 70983), (717, 30393), (921, 23661), (2151, 10131), (2629, 8289), (2763, 7887), (3377, 6453)]