20804505

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1\times {\mathrm{163}}^1$

素因数の和:365

約数の個数: 32

約数和(自身を含む): 34258944

約数和(自身を除く): 13454439

約数列:

[1, 3, 5, 15, 67, 127, 163, 201, 335, 381, 489, 635, 815, 1005, 1905, 2445, 8509, 10921, 20701, 25527, 32763, 42545, 54605, 62103, 103505, 127635, 163815, 310515, 1386967, 4160901, 6934835, 20804505]

約数ペア:

[(1, 20804505), (3, 6934835), (5, 4160901), (15, 1386967), (67, 310515), (127, 163815), (163, 127635), (201, 103505), (335, 62103), (381, 54605), (489, 42545), (635, 32763), (815, 25527), (1005, 20701), (1905, 10921), (2445, 8509)]