20966535

素因数分解:

$3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 37908000

約数和(自身を除く): 16941465

約数列:

[1, 3, 5, 9, 15, 45, 53, 59, 149, 159, 177, 265, 295, 447, 477, 531, 745, 795, 885, 1341, 2235, 2385, 2655, 3127, 6705, 7897, 8791, 9381, 15635, 23691, 26373, 28143, 39485, 43955, 46905, 71073, 79119, 118455, 131865, 140715, 355365, 395595, 465923, 1397769, 2329615, 4193307, 6988845, 20966535]

約数ペア:

[(1, 20966535), (3, 6988845), (5, 4193307), (9, 2329615), (15, 1397769), (45, 465923), (53, 395595), (59, 355365), (149, 140715), (159, 131865), (177, 118455), (265, 79119), (295, 71073), (447, 46905), (477, 43955), (531, 39485), (745, 28143), (795, 26373), (885, 23691), (1341, 15635), (2235, 9381), (2385, 8791), (2655, 7897), (3127, 6705)]