21378885

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{11779}}^1$

素因数の和:11809

約数の個数: 24

約数和(自身を含む): 37601760

約数和(自身を除く): 16222875

約数列:

[1, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605, 1815, 11779, 35337, 58895, 129569, 176685, 388707, 647845, 1425259, 1943535, 4275777, 7126295, 21378885]

約数ペア:

[(1, 21378885), (3, 7126295), (5, 4275777), (11, 1943535), (15, 1425259), (33, 647845), (55, 388707), (121, 176685), (165, 129569), (363, 58895), (605, 35337), (1815, 11779)]