21120605

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{2803}}^1$

素因数の和:2956

約数の個数: 16

約数和(自身を含む): 27860544

約数和(自身を除く): 6739939

約数列:

[1, 5, 11, 55, 137, 685, 1507, 2803, 7535, 14015, 30833, 154165, 384011, 1920055, 4224121, 21120605]

約数ペア:

[(1, 21120605), (5, 4224121), (11, 1920055), (55, 384011), (137, 154165), (685, 30833), (1507, 14015), (2803, 7535)]