21504008

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{1237}}^1$

素因数の和:1337

約数の個数: 32

約数和(自身を含む): 42116760

約数和(自身を除く): 20612752

約数列:

[1, 2, 4, 8, 41, 53, 82, 106, 164, 212, 328, 424, 1237, 2173, 2474, 4346, 4948, 8692, 9896, 17384, 50717, 65561, 101434, 131122, 202868, 262244, 405736, 524488, 2688001, 5376002, 10752004, 21504008]

約数ペア:

[(1, 21504008), (2, 10752004), (4, 5376002), (8, 2688001), (41, 524488), (53, 405736), (82, 262244), (106, 202868), (164, 131122), (212, 101434), (328, 65561), (424, 50717), (1237, 17384), (2173, 9896), (2474, 8692), (4346, 4948)]