16920981

素因数分解:

$3^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{2713}}^1$

素因数の和:2743

約数の個数: 40

約数和(自身を含む): 31525824

約数和(自身を除く): 14604843

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 81, 99, 189, 231, 297, 567, 693, 891, 2079, 2713, 6237, 8139, 18991, 24417, 29843, 56973, 73251, 89529, 170919, 208901, 219753, 268587, 512757, 626703, 805761, 1538271, 1880109, 2417283, 5640327, 16920981]

約数ペア:

[(1, 16920981), (3, 5640327), (7, 2417283), (9, 1880109), (11, 1538271), (21, 805761), (27, 626703), (33, 512757), (63, 268587), (77, 219753), (81, 208901), (99, 170919), (189, 89529), (231, 73251), (297, 56973), (567, 29843), (693, 24417), (891, 18991), (2079, 8139), (2713, 6237)]