20791665

素因数分解:

$3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3527}}^1$

素因数の和:3669

約数の個数: 24

約数和(自身を含む): 36324288

約数和(自身を除く): 15532623

約数列:

[1, 3, 5, 9, 15, 45, 131, 393, 655, 1179, 1965, 3527, 5895, 10581, 17635, 31743, 52905, 158715, 462037, 1386111, 2310185, 4158333, 6930555, 20791665]

約数ペア:

[(1, 20791665), (3, 6930555), (5, 4158333), (9, 2310185), (15, 1386111), (45, 462037), (131, 158715), (393, 52905), (655, 31743), (1179, 17635), (1965, 10581), (3527, 5895)]