21401919

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{347}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 39087360

約数和(自身を除く): 17685441

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 89, 99, 231, 267, 347, 623, 693, 801, 979, 1041, 1869, 2429, 2937, 3123, 3817, 5607, 6853, 7287, 8811, 11451, 20559, 21861, 26719, 30883, 34353, 61677, 80157, 92649, 216181, 240471, 277947, 339713, 648543, 1019139, 1945629, 2377991, 3057417, 7133973, 21401919]

約数ペア:

[(1, 21401919), (3, 7133973), (7, 3057417), (9, 2377991), (11, 1945629), (21, 1019139), (33, 648543), (63, 339713), (77, 277947), (89, 240471), (99, 216181), (231, 92649), (267, 80157), (347, 61677), (623, 34353), (693, 30883), (801, 26719), (979, 21861), (1041, 20559), (1869, 11451), (2429, 8811), (2937, 7287), (3123, 6853), (3817, 5607)]