20645845

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12109}}^1$

素因数の和:12156

約数の個数: 16

約数和(自身を含む): 27901440

約数和(自身を除く): 7255595

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12109, 60545, 133199, 375379, 665995, 1876895, 4129169, 20645845]

約数ペア:

[(1, 20645845), (5, 4129169), (11, 1876895), (31, 665995), (55, 375379), (155, 133199), (341, 60545), (1705, 12109)]