17980821

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1481}}^1$

素因数の和:1577

約数の個数: 24

約数和(自身を含む): 27743040

約数和(自身を除く): 9762219

約数列:

[1, 3, 9, 19, 57, 71, 171, 213, 639, 1349, 1481, 4047, 4443, 12141, 13329, 28139, 84417, 105151, 253251, 315453, 946359, 1997869, 5993607, 17980821]

約数ペア:

[(1, 17980821), (3, 5993607), (9, 1997869), (19, 946359), (57, 315453), (71, 253251), (171, 105151), (213, 84417), (639, 28139), (1349, 13329), (1481, 12141), (4047, 4443)]