21356005

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{4003}}^1$

素因数の和:4116

約数の個数: 16

約数和(自身を含む): 28252224

約数和(自身を除く): 6896219

約数列:

[1, 5, 11, 55, 97, 485, 1067, 4003, 5335, 20015, 44033, 220165, 388291, 1941455, 4271201, 21356005]

約数ペア:

[(1, 21356005), (5, 4271201), (11, 1941455), (55, 388291), (97, 220165), (485, 44033), (1067, 20015), (4003, 5335)]