20217604

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{2309}}^1$

素因数の和:2523

約数の個数: 24

約数和(自身を含む): 38808000

約数和(自身を除く): 18590396

約数列:

[1, 2, 4, 11, 22, 44, 199, 398, 796, 2189, 2309, 4378, 4618, 8756, 9236, 25399, 50798, 101596, 459491, 918982, 1837964, 5054401, 10108802, 20217604]

約数ペア:

[(1, 20217604), (2, 10108802), (4, 5054401), (11, 1837964), (22, 918982), (44, 459491), (199, 101596), (398, 50798), (796, 25399), (2189, 9236), (2309, 8756), (4378, 4618)]