21241209

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{6373}}^1$

素因数の和:6488

約数の個数: 16

約数和(自身を含む): 31207104

約数和(自身を除く): 9965895

約数列:

[1, 3, 11, 33, 101, 303, 1111, 3333, 6373, 19119, 70103, 210309, 643673, 1931019, 7080403, 21241209]

約数ペア:

[(1, 21241209), (3, 7080403), (11, 1931019), (33, 643673), (101, 210309), (303, 70103), (1111, 19119), (3333, 6373)]