20703815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12143}}^1$

素因数の和:12190

約数の個数: 16

約数和(自身を含む): 27979776

約数和(自身を除く): 7275961

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12143, 60715, 133573, 376433, 667865, 1882165, 4140763, 20703815]

約数ペア:

[(1, 20703815), (5, 4140763), (11, 1882165), (31, 667865), (55, 376433), (155, 133573), (341, 60715), (1705, 12143)]