20978289

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{4423}}^1$

素因数の和:4477

約数の個数: 24

約数和(自身を含む): 33126912

約数和(自身を除く): 12148623

約数列:

[1, 3, 9, 17, 31, 51, 93, 153, 279, 527, 1581, 4423, 4743, 13269, 39807, 75191, 137113, 225573, 411339, 676719, 1234017, 2330921, 6992763, 20978289]

約数ペア:

[(1, 20978289), (3, 6992763), (9, 2330921), (17, 1234017), (31, 676719), (51, 411339), (93, 225573), (153, 137113), (279, 75191), (527, 39807), (1581, 13269), (4423, 4743)]