21528155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{509}}^1\times {\mathrm{769}}^1$

素因数の和:1294

約数の個数: 16

約数和(自身を含む): 28274400

約数和(自身を除く): 6746245

約数列:

[1, 5, 11, 55, 509, 769, 2545, 3845, 5599, 8459, 27995, 42295, 391421, 1957105, 4305631, 21528155]

約数ペア:

[(1, 21528155), (5, 4305631), (11, 1957105), (55, 391421), (509, 42295), (769, 27995), (2545, 8459), (3845, 5599)]