1215205047

素因数分解:

$3^2\times 7^2\times {\mathrm{2755567}}^1$

素因数の和:2755587

約数の個数: 18

約数和(自身を含む): 2041875888

約数和(自身を除く): 826670841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 2755567, 8266701, 19288969, 24800103, 57866907, 135022783, 173600721, 405068349, 1215205047]

約数ペア:

[(1, 1215205047), (3, 405068349), (7, 173600721), (9, 135022783), (21, 57866907), (49, 24800103), (63, 19288969), (147, 8266701), (441, 2755567)]