21256474509

素因数分解:

$3^2\times {\mathrm{1511}}^1\times {\mathrm{1563091}}^1$

素因数の和:1564608

約数の個数: 12

約数和(自身を含む): 30724136352

約数和(自身を除く): 9467661843

約数列:

[1, 3, 9, 1511, 4533, 13599, 1563091, 4689273, 14067819, 2361830501, 7085491503, 21256474509]

約数ペア:

[(1, 21256474509), (3, 7085491503), (9, 2361830501), (1511, 14067819), (4533, 4689273), (13599, 1563091)]