21639519

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{641}}^1$

素因数の和:700

約数の個数: 36

約数和(自身を含む): 35520576

約数和(自身を除く): 13881057

約数列:

[1, 3, 9, 11, 31, 33, 93, 99, 121, 279, 341, 363, 641, 1023, 1089, 1923, 3069, 3751, 5769, 7051, 11253, 19871, 21153, 33759, 59613, 63459, 77561, 178839, 218581, 232683, 655743, 698049, 1967229, 2404391, 7213173, 21639519]

約数ペア:

[(1, 21639519), (3, 7213173), (9, 2404391), (11, 1967229), (31, 698049), (33, 655743), (93, 232683), (99, 218581), (121, 178839), (279, 77561), (341, 63459), (363, 59613), (641, 33759), (1023, 21153), (1089, 19871), (1923, 11253), (3069, 7051), (3751, 5769)]