20725551

素因数分解:

$3^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{3323}}^1$

素因数の和:3353

約数の個数: 40

約数和(自身を含む): 38611584

約数和(自身を除く): 17886033

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 81, 99, 189, 231, 297, 567, 693, 891, 2079, 3323, 6237, 9969, 23261, 29907, 36553, 69783, 89721, 109659, 209349, 255871, 269163, 328977, 628047, 767613, 986931, 1884141, 2302839, 2960793, 6908517, 20725551]

約数ペア:

[(1, 20725551), (3, 6908517), (7, 2960793), (9, 2302839), (11, 1884141), (21, 986931), (27, 767613), (33, 628047), (63, 328977), (77, 269163), (81, 255871), (99, 209349), (189, 109659), (231, 89721), (297, 69783), (567, 36553), (693, 29907), (891, 23261), (2079, 9969), (3323, 6237)]